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 5 - Solving Systems of Linear Equations - 5.3 - Solving Systems of Linear Equations by Elimination - Exercises - Page 252: 40

Answer

$y=-2x+7$

Work Step by Step

The given point is $(4,-1)$. The given equation of the line is $\Rightarrow y=-2x+7$ Slope of the line is $m=-2$. Slope of the parallel line is $m=-2$. The slope-intercept form is $\Rightarrow y=mx+b$ Substitute $-2$ for $m,4$ for $x,$ and $-1$ for $y$. $\Rightarrow -1=-2(4)+b$ Simplify. $\Rightarrow -1=-8+b$ Add $8$ to each side. $\Rightarrow -1+8=-8+b+8$ Simplify. $\Rightarrow 7=b$. The equation of the parallel line is $\Rightarrow y=-2x+7$.
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