• Learn the defi nition of a function when applied to ordered pairs and graphs. • Know the vertical line test. • Be able to use function notation, and evaluate functions. • Use the slope and the y-intercept to graph linear functions. Read Sections 4.1 to 4.5, and complete the exercises. 5 Know how to determine if a relation is a function. Be able to use function notation, evaluate function, and graph linear functions. 6 Write your own goal. Complete the Chapter Review and Chapter Test. How did you do? • • After completing the emPOWERme, Checklist for Effective Notes, see if a classmate could learn the material by reading your notes. • Can you explain the two ways to graph a linear equation? Can these two ways be used for vertical and horizontal lines? • Do all linear equations contain both an x and a y? If not, what type of lines would contain only one variable in the equation? 4.1 Introduction to Linear Equations in Two Variables What are your objectives for Section 4.1? How can you accomplish each objective? 1 Plot Ordered Pairs • Be able to draw and label the x-axis and y-axis. • Know how to determine the x-coordinate and the y-coordinate of an ordered pair, and understand what these values mean when compared to the origin. • Complete the given example on your own. • Complete You Try 1. 2 Decide Whether an Ordered Pair Is a Solution of an Equation • Know how to substitute x- and y-values into an equation and simplify. • Complete the given example on your own. • Complete You Try 2. 138 CHAPTER 4 Linear Equations in Two Variables and Functions www.mhhe.com/messersmith
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