Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 4 - Writing Linear Functions - Chapter Review - Page 227: 9

Answer

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

Work Step by Step

The given point is $(2,-3)$. The given equation of the line is $\Rightarrow y=-2x-3$ Slope of the line is $m=-2$. Slope of the perpendicular line is $m=\frac{1}{2}$. The slope-intercept form is $\Rightarrow y=mx+b$ Substitute $\frac{1}{2}$ for $m,2$ for $x,$ and $-3$ for $y$. $\Rightarrow -3=\frac{1}{2}(2)+b$ Simplify. $\Rightarrow -3=1+b$ Subtract $1$ from each side. $\Rightarrow -3-1=1+b-1$ Simplify. $\Rightarrow -4=b$ The equation of the perpendicular line is $\Rightarrow y=\frac{1}{2}x-4$.
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