Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-4 Division Properties of Exponents - Practice and Problem-Solving Exercises - Page 445: 95

Answer

(H) $y=\frac{1}{4}x-5$.

Work Step by Step

The given point is $\Rightarrow (x_1,y_1)=(8,-3)$ Perpendicular line: $\Rightarrow y=-4x+5$ It is in slope-intercept form $y=mx+c$. The slope of the equation is $m=−4$ Perpendicular lines have slopes that are negative reciprocals of one another. The slope of the required line is $\Rightarrow m=\frac{1}{4}$ The equation of the line is $\Rightarrow y−y_1=m(x−x_1)$ Substitute all values into the point-slope equation. $\Rightarrow y−(-3)=(\frac{1}{4})(x−8)$ Simplify. $\Rightarrow y+3=\frac{1}{4}x−2$ $\Rightarrow y=\frac{1}{4}x−2-3$ $\Rightarrow y=\frac{1}{4}x−5$ Hence, the correct option is (H) $y=\frac{1}{4}x-5$.
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