Chapter 3 Graphing Linear Functions - How to Solve Systems of Linear Equations by Graphing.

Verifying that functions are inverses (Algebra 2 level) Learn. Find an equation for this linear function in slope-intercept form. 1 Lesson Lesson Tutorials Key Vocabulary linear equation, p. When given an equation, such as x = 4 x = 4 or x = −5, x = − 5, there are specific values for the variable. The standard formof a linear equation is Ax+By=C, where A, B, and Care real numbers and Aand Bare not both zero. 4 – Graphing Linear Equations in Slope-Intercept Form 4. P is the constant term or the y-intercept and is also the value of the dependent variable. Chapter 3 6 Glencoe Algebra 1 3-1 Study Guide and Intervention (continued) Graphing Linear Equations Graph Linear Equations The graph of a linear equations represents all the solutions of the equation. Graph horizontal and vertical lines. Big Ideas Math - Algebra 1, A Common Core Curriculum answers to Chapter 2 - Solving Linear Inequalities - 2. Step 1: To graph a linear equation with two variables, we graph both equations. A nonlinear graph shows a function as a. Like if you got two oranges for five dollars. A linear relationship in mathematics is one in which the graphing of a data set results in a straight line. 4 - Graphing Linear Equations in Standard Form - Exercises - Page 133 13 including work step by step written by community members like you. 00 Linear Functions (RW Supplements) 0-01 Solve Linear Equations and Inequities (RW) 0-02 Use Problem Solving Strategies and Models (RW) 0-03 Solve Absolute Value Equations and Inequities (RW) 0-04 Find Slope and Write Equations of …. y = -5 horizontal/vertical slope: _____ 24. Follow these steps to learn how: Graph the line y =−2 3x− 4 3 y = − 2 3 x − 4 3. 2-2 Solving Two-Step Equations. • I can explain how a transformation affects the graph of a linear function. Learning Target Understand Solvequadratic equations and algebraically. Get NCERT solutions of Chapter 3 Class 10 - Pair of Linear Equations in Two Variables at Teachoo. Given an equation, graph by plotting points. 7 Graphing a Linear Function (#6b) homework; FM 10 Ch5 REVIEW VIDEO !!!!! Graphing-Calculator-Activity-FM-10-5. Chapter 3 - Graphing Linear Functions. y = mx + b Write the slope-intercept form. In fact, for any exponential function with the form f(x) = abx, b is the constant ratio of the function. Before we graph any radical function, we first find the domain of the function. Given a linear inequality in two variables, ax + by < c, we use the steps below to graph ax + by < c, where the the same process is applied for >, ≤, ≥ and a, b ≠ 0. amazon auction pallets near me Find three points whose coordinates are solutions to the equation. Math Chapter 3 - Graphing Linear Functions. Borough of Manhattan Community College. the equation of a linear function of the form y−y1 =m(x−x1) y − y 1 = m ( x − x 1) slope. 1) Determine if a given ordered pair is a solution of a system of equations. Identify the independent and …. 1 – Graphing Linear Equations 4. Just substitute selected values of x …. 3 - Function Notation - Exercises - Page 125 28 including work step by step written by community members like you. This purchase will give you access to all 6 lessons in my Algebra 1 Chapter 2 Flipped series. The topics include: relations, the definition of a function, domain, range, the difference quotient, graphing functions, average rate of change, maxima, and transformations. to solve a linear equation in two variables in the form of a graph. 4! Homework is to watch and take notes on Perpendicular/Parallel lines video. 4 - Graphing Linear Equations In Standard Form Chapter 3. Solve the second equation for y. To solve a system of linear equations by graphing. RD Sharma Solutions Class 10 Maths Chapter 3 – Free PDF Download. 5: Graphing Quadratic Inequalities. Find step-by-step solutions and answers to Big Ideas Math: Course 3, California Edition - 9781608406722, as well as thousands of textbooks so you can move forward with confidence. To graph a linear equation, create a function table with at least 3 ordered pairs. (Yes, this already includes the form where y is a constant, because this would be the result of taking m to be 0 in the equation y=mx+b). Chapter 3 Graphing Linear Functions Sec 3. 6 - Solving Absolute Value Inequalities Chapter 3 - Graphing Linear Equations Chapter 3. Chapter 3 Graphing Linear Functions Textbook section IXL skills Lesson 3. Solve linear equations with variables on both sides. By clicking "TRY IT", I agree to receive. 4: Solving Radical Equations and Inequalities. Solve the system by graphing: {3x + y = − 1 2x + y = 0. Introduction to Systems of Equations and Inequalities; 7. Knowing the basic shape of an absolute value graph will help us as we continue our exploration of absolute values. The y-intercept of a graph is the y-coordinate of a point where the graph crosses the y-axis. a y = 1 +2x b y = 2 +x c y = 10 −x d y = 9 −2x 3 For each of these linear equations, use a graphics calculator to do the following: i Plot a graph for the window given. Table for 1st equation x = y – 1. May 28, 2023 · Graph a linear equation by plotting points. The slope of the tangent line reveals how steep the graph is risin. Professor A1A Chapter 6 Review Recording. The form y=m (x-a) is essentially different from the other two forms, and means slope m and x-intercept (instead of y-intercept) a. Slope-intercept form: write an equation from a graph. A linear equation is simply an algebraic expression that represents a line. This can also be written as f − 1 ( f ( x)) = x for all x in the domain of f. 75 – 115 represents their profit for selling greeting cards. 1 #4, 5, 6bd, 7bd, 9bd, 11, 13, 16, 17 6. Slope is a measure of steepness and indicates in some situations how fast something is changing—specifically, its rate of change. Model applications using slope and y y-intercept. Standard form: find x- and y-intercepts 8SN 2. Note that 2 ordered pairs (-3,17) and (4,-18) are given in the table. Chapter 3:Graphing Linear Equations and Functions. This means that two people graphing the line might use different sets of three points. y − y1 = m(x − x1) Point − slopeform. 5 - Graphing Linear Equations in Slope-Intercept Form - Exercises - Page 142 21 including work step by step written by community members like you. 3 Slopes and Their Graphs Another important property of any line or linear function is slope. X2 becomes X, and Y2 becomes Y. Note that y = 2 3x + 3 has the form y = mx + b, where m = 2/3 and b = 3. Graph functions using slope and y y-intercept. A linear equation with one variable 130, \(x\), is an equation that can be written in the standard form \(ax + b = 0\) where \(a\) and \(b\) are real numbers and \(a ≠ 0\). An x-coordinate of the point at which a graph of an equation crosses the x-axis in an x-intercept. 344 views · 7 months ago #hindsmaths more . 5 - Solving Compound Inequalities Chapter 2. We saw better methods in sections 4. Solve 2x + 3y = 11 and 2x – 4y = -24 and hence find the value of’m’ for which y = mx +3. Practice Graphing Linear Equations. He was at sea level after 30 minutes of driving. Intermediate Algebra 1e (OpenStax) 3: Graphs and Functions. On one side of the line are the points with \ (2x+3y>6\) and on the other side of the line are the points with \ (2x+3y<6\). Given the following set of information, find a linear equation satisfying the conditions, if possible. Find the domain and range of a. Any absolute value function can be written in vertex form, and its graph is. The formula y = mx+b is used to represent a linear relationship. We will start off the chapter with a. Begin by choosing a couple of values for x e. In mathematics, linear refers to an equation or function that is the equation of a straight line and takes the form y = mx + b, where “m” is equal to the slope, and “b” is equal to. The linear equations x = 2 and y = − 3 only have one variable in each of them. In this section, we will expand our knowledge of graphing by graphing linear functions. the logarithm is the exponent to which must be raised to get. Evaluate y = 5 − 3x for different values of x, and create a table of corresponding x and y values. Identify linear functions using graphs, tables, and equations. Similarly, when B= 0, the equation becomes Ax=C, or x=. b) On the same coordinate system, draw a line that contains the point (0, 1) and has slope −3. 99 per gallon and you put 10 gallons in your car, you will pay $39. Use the graph to determine how many bushels per acre will be produced if a. The domain of f is all real numbers. The first number (called the x-coordinate,or the abscissa) is the horizontal position from the origin. 3 - Graphing Linear Functions - Exercise Set - Page 151 80 including work step by step written by community members like you. Introductory Algebra for College Students (7th Edition) answers to Chapter 3 - Section 3. Each callout points to a specific location on the slide, describing or labeling it. Graphing the inverse of a linear function (Opens a modal) Practice. Analyze a regression line of a data set. Lesson 1 Graphing Systems of Equations. Evaluate the expression for the given value of x. 363K views · 6:30 · Go to channel. Elementary and Intermediate Algebra. A function has Click the card to flip 👆. How can you describe the graph of the equation y mx b? +. Write a linear equation that gives the value of the car in terms of its age in years. Linear functions can be written in the slope-intercept form of a line. Graph of a Linear Equation: The graph of a linear equation \(Ax+By=C\) is a straight line. Textbook Authors: Larson, Ron; Boswell, Laurie, ISBN-10: 978-1-60840-838-2, ISBN-13: 978-1-60840-838-2, Publisher: …. The graph of a linear equation in two variables is the set of points (x, y) in a coordinate plane that represents all solutions of the equation. Also, three years from now, I shall be three times as old as you will be”. linear equation in two variables. x intercept at (–4, 0) and y-intercept at (0, –6) 6. 160 Chapter 3 Graphing Linear Functions Stretches and Shrinks You can transform a function by multiplying all the inputs (x-coordinates) by the same factor a. Let g be a translation 1 unit down and 2 units left followed by a vertical shrink by a factor of 12 of the graph of f (x) = | x |. I can write a linear equation in standard form, Ax + By = C. Common Core State Standards: HSA-CED. For any one-to-one function f ( x) = y, a function f − 1 ( x ) is an inverse function of f if f − 1 ( y) = x. Solve linear equations: complete the solution. Big Ideas Math - Algebra 1, A Common Core Curriculum answers to Chapter 7 - Polynomial Equations and Factoring - 7. Step 1: Solve for y to obtain slope-intercept form. The graph of a linear equation in two variables is the set of …. • I can graph linear functions written in different forms. 1: Graph of a Linear Equation in Two Variables is shared under a CC BY-NC license and was authored, remixed, and/or curated by CK-12 Foundation via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. Section 1-2: Functions and Graphs. Señor Pablo TV•77K views · 14:46 · Go. Chapter 3__Graphing Linear Functions. Verify solutions to linear equations with two variables. 14, we can see that, in graph of the equation y = 2 x − 3, y = 2 x − 3, for every x-value there is only one y-value, as shown in the accompanying table. Understand the concept of a function. Chapter 3 Graphing Linear Equations and Functions. 5: Graphing Linear Equations in Slope-Intercept Form. The graph of a linear equation is a line. 2 Solve Equations using the Division and Multiplication Properties of Equality; 2. Chapter 3: Graphing Linear Functions. 2 Systems of Linear Equations: Three Variables; 9. ” This is the full text of the “Responsible Blitzscaling” c. Solve a System of Linear Equations by Graphing. 3 - Graphing Linear Functions - Exercise Set - Page 149 3 including work step by step written by community members like you. When the independent variable increases by 1, the change in x is 1. Chapter 2: Justification and Similarity. Give today and help us reach more students. Systems of equations with graphing: y=7/5x-5 & y=3/5x-1. Draw a line through the points to indicate all of the points on the line. 5 Matrices and Matrix Operations; 9. 2) Solve a system of two linear equations by graphing. Chapter 3 Graphing Linear Functions Textbook section IXL skills Section 3. Plot the points on a rectangular coordinate system. If you are planning on buying a house after a Chapter 7, choosing the. 3 - Function Notation Chapter 3. The line \ (2x+3y=6\) is the boundary line. Imagine placing a plant in the ground one day and finding that it has doubled its height just a few days later. But it does not appear to be in the form Ax + By = C. Solution: Worksheets for Class 10 Maths. Facebook today unveiled a new search feature for its flagship product, facebook. The point where the graph changes direction. Representing a Linear Function in Graphical Form. You can use intercepts to graph linear equations. 148 Chapter 3 Graphing Linear Functions Stretches and Shrinks You can transform a function by multiplying all the x-coordinates (inputs) by the same factor a. Sometimes the points are distinct, and other …. Section 3-3: Rate of Change and Slope. Parallel lines have the same slope and different y -intercepts. The absolute value function is commonly thought of as providing the distance the number is from zero on a number line. 5: Graphing Linear Equations in Slope-Intercept Form 1. x + 3y = −9 Using Intercepts to Graph Linear Equations You can use the fact that two points determine a line to graph a linear equation. Graphing Linear Equations in Slope-Intercept Form (3. 148 Chapter 3 Graphing Linear Functions SELF-ASSESSMENT 1 I do not understand. where bb is the initial or starting value of the function (when input, x=0x=0 ), and mm is the constant rate of change, or slope of the function. 3 Solve Mixture Applications with Systems of Equations; 4. An equation in the slope-intercept form of a line includes the slope and the initial value of the function. Recall that in Linear Functions, we wrote the equation for a linear function from a graph. There are several things to note from the graph. Graphing Linear Functions - all with Video …. Share your videos with friends, family, and the world. Find the slopes of the lines that are parallel and perpendicular to y = 3x+ 5. Section 4-2: Solving Systems of Equations by Substitution. Solution · First, plot the y-intercept (0, 4). kim's magic touch dog grooming It has an infinite number of solutions. One car starts from A and another from B at the same time. This is an example of the saying, “A picture is worth a thousand words. 5: Performing Function Operations. If you’d like a pdf document containing the solutions the download tab above contains links to pdf’s containing the solutions for the full book, chapter and section. evaluate and interpret Use the slope-intercept form of a linear equation. Most people prefer to have A, B, and C be integers and A ≥ 0 when writing a linear equation in standard form, although it is not strictly necessary. We need to find the coordinates of at least two points. A relation that pairs each input with exactly one output. Here is an example of a linear equation in two variables, x and y. For example, x+2y = 6 is a linear equation and some of its solution are (0,3), (6,0), (2,2) because, they satisfy x+2y = 6. 1) = 2 +1 2) = +5 3) = 4±8 4) = 2 5) = ±9 6) = 2 +4 7) = ±4± 8) = 4 ±12 9) = ± ±2. 1, the graph of any linear function is a line. Quadratic functions & equations. A common model for learning has an equation similar to k ( t) = − 2 − t + 1, k ( t) = − 2 − t + 1, where k k is the percentage of mastery that can be achieved after t t practice sessions. You can use a graph to show the solutions of a linear equation. It can be found by dividing y by x (y/x). The equation for a linear function is of the form: f(x) = mx + b. Finding the Line of Best Fit Using a Graphing Utility. Introduction to Chapter 3 Functions. We can use the function relationship from above, D (t) = 83 t + 250, D (t) = 83 t + 250, to draw a graph, represented in Figure 3. Big Ideas Math - Algebra 1, A Common Core Curriculum answers to Chapter 6 - Exponential Functions and Sequences - 6. Good question! In x and/or y, any linear equation is equivalent to one of two forms: x=a or y=mx+b where a, m, and b are constants. The first characteristic is its y-intercept, which is the point at which the input value is zero. Quadratics: Multiplying & factoring. Domain and Range Activity; Piecewise Defined Functions Activity; Gist of Domain, Range and Piecewise Defined Functions; 3 Exponential Functions. In this chapter we will use three methods to solve a system of linear equations. Level up on the above skills and collect up to 320 Mastery points Start quiz. 144 Linear Equations A linear equation is an equation whose graph is a line. Real world uses for linear functions include solving problems and finding unknowns in engineering, economics and finances. 2 Pair of Linear Equations in Two Variables An equation which can be put in the form ax + by + c = 0, where a, b and c are real numbers, and a and b are not zeros, is called a linear equation. The exponent of 2 on the x prevents this equation from being linear. To graph a logarithmic function y = log a x, y = log a x, it is easiest to convert the equation to its exponential form, x = a y. Woven; Transformation of curves; Wallace-Simson Line, Orthopole, and Deltoid. The set of outputs is called the range of the function. Figure \(\PageIndex{3}\): Finding the equation of a linear function with a graph that is a line between two given points. Generally, plotting points is not the most efficient way to graph a line. 5: Writing Equations in Slope-Intercept Form. 44 includes the ordered pairs (−3, −1) (−3, −1) and (−3, 4). Use intercepts to graph the linear equation. yield\(=2x+150\); \(166\) bushels. EnrichmentPencils of LinesAll of the lines that pass through a single point in the same plane are called a pencil of lines. Make a table of a few values and graph the function. Knowing this, we can use absolute value functions to solve some kinds of real-world problems. cowboy emoji meaning from a guy Comments · Learn Functions – Understand In 7 Minutes · Slope Intercept Form - Understand In 10 Minutes · STUDENT QUESTION Grade 12 Calculus Gr. 3 - Function Notations Chapter 3. 1 - Functions - Exercises - Page 108 10 including work step by step written by community members like you. Combine transformations of graphs of absolute value functions. If the lines intersect, the solution is that intersection point. Linear functions may be graphed by plotting points or by using the y-intercept and slope. 5 - Integrated Review - Linear Equations in Two Variables - Page 175 7 including work step by step written by community members like you. 3 - Graphing Linear Functions - Exercise Set - Page 150 15 including work step by step written by community members like you. boss surface drive motors Learn vocabulary, terms, and more with flashcards, games, and other study tools. Linear equations, functions, & graphs. 2 Plot the graph of the linear equations below by first forming a table of values of y using x = 0,1,2,3,4. the ratio of the change in output values to the change in input values; a measure of the steepness of a line. Find the x- and y-intercepts of the graph of the linear equation. The parallel line has the identical slope, so its slope is also 3. 4 - Graphing Linear Equations in Standard Form - Monitoring Progress - Page 131 3 including work step by step written by community members like you. Chapter 13 cases last three to five years, and during that time, the court and the Chapter 13 trustee will tig. 2 Graph Linear Equations using Intercepts. To write the inequality, use the following notation and symbols: Symbol. 1 Graph Linear Equations in Two Variables. In this chapter, you will graph different relationships and learn ways to describe and analyze graphs. Introduction to Systems of Equations and Inequalities; 9. 5 Lesson WWhat You Will Learnhat You Will Learn Find the slope of a line. Use the graph or table to write a linear function that relates y to x. This chapter covers the properties of functions, a library of functions, and graphs of functions. Expected Learning Outcomes The students will be able to: 1) Graph linear functions by using the slope and the y-intercept in Slope-Intercept Form. Chapter Success Criteria I can perform operations with complex numbers. 7 – Graphing Linear Inequalities Chapter Sections § 3. Chapter Success Criteria I can identify the graph of a linear function. Practice using the BIM Algebra 1 Graphing Linear Functions Solution Key and learn all the fundamentals involved. Hence, y = 2 3x + 3 is a linear equation. Begin by taking a look at Figure 8. Big Ideas Math Algebra 1: A Common Core Curriculum. craigslist versailles ky Page 169: Graphing Inequalities in Two Variables. Explain how the values of f(x) and g(x) differ for. Unit 1: Solving equations & inequalities. The graph of the above function is a line passing through the points (- 2 , 0) and (0 , 4) as shown below. y-intercepts to solve real-life problems. Textbook Authors: Larson, Ron; Boswell, Laurie, ISBN-10: 978-1-60840-838-2, …. Chapter 8: Polygons and Circles. 3 Systems of Nonlinear Equations and Inequalities: Two Variables; Chapter 3; Chapter 4; Chapter 5; Chapter 6; Chapter 7; Chapter 8; Chapter 9; The graph above tracks the value of that initial investment of just under $100 over the 40 years. 2: A function maps every element in the domain to exactly one element in the range. Mathematical Thinking: Mathematically proficient students can apply the mathematics they know to solve problems arising in everyday life, society, and the workplace. In mathematical terms, For a linear function f(x) = mx + b if m > 0, then f(x) is an increasing function. The constant 𝑚 is known as the slope, or gradient, of the line, and 𝑏 is the line’s 𝑦 -intercept—that is, where the line crosses the 𝑦 …. Notes on Solving Equations, Inequalities and Absolute Value. 8 Graphing Absolute Value Functions 135 Chapter 4 Writing Linear Functions 141 4. When the dependent variable increases by 3, the change in y is 3. Solution: Since both the lines coincide. The graph of a decreasing linear function is a line moving in a downhill direction across the coordinate axes. Algebra: Chapter 3- Graphing Linear Functions. 3 Linear Equations in Two Variables Learning Objectives 1 Write an equation of a line given its slope and y-intercept. 1 3:38 - Graphing with Intercepts 4:33 - Ex. ; Enter x-values down the first column using positive and negative values. 3: Graphing Quadratic Functions. Free Algebra 2 worksheets created with Infinite Algebra 2. Use rate of change to solve problems. 3 – Graphing Proportional Relationships 4. 25, your friends hair grows faster than …. We will start by making a table of values. shein blue dress long Represent the following pair of equations graphically and write the coordinates of points where the lines intersect y-axis. Explore quizzes and practice tests created by teachers and students or create one from your course material. In this lesson we will learn how a linear function moves. 122 Previous linear function quadrant Core VocabularyCore Vocabulary WWhat You Will Learnhat You Will Learn Use function notation to evaluate and interpret functions. We can graph a the linear equation like 5x + 2y = 20 by rewriting it so y is isolated, then plugging in x values to find their corresponding y-values in a table. When a debtor who owns stock files for Chapter 13 bankruptcy, he generally will be allowed to keep many of his assets, including stocks and bonds. The second number (called the y-coordinate,or the ordinate) is the vertical position …. 1 - Properties of Radicals - Exercises - Page 487 76 including work step by step written by community members like you. Graphing and Writing Linear Equations Chapter Review. Graphing linear relationships: equalities inequalities absolute value functions Learn with flashcards, games, and more — for free. − x + 2y = 4 − x + 2y+ x = 4+ x 2y = x + 4 2y 2 = x + 4 2 y = 1x 2 + 4 2 y = 1 2x + 2. Answer: The linear function is y = \(\frac{1}{3}\) x + 3. One such technique is called least squares regression and can be computed by many graphing calculators, spreadsheet software, …. PowerPoint callouts are shapes that annotate your presentation with additional labels. Introduction 5 5-5-5 The simplest kind offunctions are linear functions, called that because their graphs are lines. Section 5-4: Point-Slope Form. The graph of the function is a line as expected for a linear function. Writing & solving inequalities Compound inequalities. Step 3 Use the slope to fi nd another point on the line. The initial value, or y-intercept, is the output value when the input. A function whose graph is a nonvertical line. Algebra 1 – Chapter 3: Graphing Linear Functions Learning Goal: Students will be able to: • Determine whether relations are functions • Find the domain and range of a function • Identify the independent and dependent variables of functions • Identify linear functions using graphs, tables, and equations. 3-2 Solving Linear Equations by Graphing. 1 Calculate the slope of a linear function and interpret its meaning. 3 Systems of Nonlinear Equations and Inequalities: Two Variables; in the stock chart shown in the figure at the beginning of this chapter, the stock price was $1000 on five different dates, meaning that there were five different input values that all resulted in the same output value of. 90 Chapter 3 Graphing Linear Functions 3. 4: Graphing Linear Equations in Standard Form 1. The rule for perpendicular lines is m1 = −1 m2 The rule for perpendicular lines is m 1 = − 1 m 2. Translations and Refl ections A family of functions is a group of functions with similar. Quiz yourself with questions and answers for Algebra Unit 3- Quiz 3: Graphing Linear Functions, so you can be ready for test day. 1 acre lots 2: Discrete and Continuous Domains. 3 Find the roots of a quadratic polynomial. 3: Solving Systems of Linear Equations by Elimination. roblox gun id codes Then, plot these ordered pairs on a coordinate plane. At the vertical asymptote x = − 3 x = − 3 corresponding to the ( x + 3 ) 2 ( x + 3 ) 2 factor of the denominator, the graph heads towards positive infinity on both sides. Students will check whether given ordered pairs are a …. Which of the following describes how to translate the graph of y = |x| to obtain the graph of y = |x + 1| - 2? shift left 1 and down 2. There are several real-world scenarios that can be represented by graphs of linear inequalities. Copy of Domain and Range of a Function. pvp unblocked Function: a relation that pairs each input with exactly one output. y = 3x + (−4) Rewrite the original equation in slope-intercept form. It shows a number of lines with different slopes, but all with the same y−intercept (0,3). the range of the logarithm function with base b. Graphing Linear Equations Chapter 3 (Big Ideas Math - Algebra 1). Graphing Linear Equations Chapter 4. \,[/latex]The graph crosses the x-axis, so the multiplicity of the zero must …. 2000 chevy silverado radio wiring diagram an equation that forms a line when it is graphed. Each student selects and graphs at least twelve linear equations from the equation bank to create their own unique stained glass window. Consider the function f (x) =|x|−3 f ( x) = | x | − 3. Step 2: Plot the point (0,b) where b is -4.