Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 2 - Functions, Equations, and Graphs - Chapter Test - Page 127: 12

Answer

The slope of the line perpendicular to the given line is $\frac{1}{2}$.

Work Step by Step

With lines that are perpendicular to each other, the product of their slopes is $-1$; one slope is the negative reciprocal of the other. If we want to find the slope of a line that is perpendicular to a given line, we must first find the slope of the given line. The line given is in the slope-intercept form, which is given by the formula: $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept. Therefore, the slope of the given line is the coefficient of $x$, so the slope is $-2$. Let us set up an equation to find the slope of the line that is perpendicular to the given line by multiplying the two slopes to yield $-1$. Let $x$ be the slope of the perpendicular line: $(-2)(x) = -1$ Divide both sides by $-2$: $x = \dfrac{1}{2}$
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