Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1 - Linear Functions - 1.2 Using Data to Create Scatterplots - 1.2 Exercises - Page 34: 38

Answer

a) $(13,0)$ b) $(0,10)$ c) $x=25$ d) $x=-22$ e) $y=5$

Work Step by Step

a) The $x$-intercept is the value of $x$ corresponding to $y=0$: 13. As a point it can be written as $(13,0)$ b) The $y$-intercept is the value of $y$ corresponding to $x=0$: -10. As a point it can be written as $(0,-10)$ c) The value of $x$ that results in $y=8$ is 25 because the point $(25,8)$ belongs to the graph. $x=25$ d) The value of $x$ that results in $y=-17$ is -22 because the point $(-22,-17)$ belongs to the graph. $x=-22$ e) The value of $y$ when $x=20$ is 5 because the point $(20,5)$ belongs to the graph. $y=5$
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