Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 2 - Review - Exercises - Page 233: 65

Answer

$y = \frac{-1}{2} x + 4$

Work Step by Step

From the graph, we are given the points $(0,4) (8,0)$ To determine the slope, use $m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ Using (0,4) and (8,0), $m = \frac{0-4}{8-0} = \frac{-4}{8} = \frac{-1}{2}$ b (the y-intercept) is equal to 4 (from (0, 4)) Thus the equation is $y = \frac{-1}{2} x + 4$
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