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 - 4.1-4.3 - Quiz - Page 194: 1

Answer

The slope-intercept form is $y=5x-2$.

Work Step by Step

The given points are $(x_1,y_1)=(1,3)$ and $(x_2,y_2)=(0,-2)$ Slope $\Rightarrow m=\frac{y_2-y_1}{x_2-x_1}$ Substitute all the values. $\Rightarrow m=\frac{-2-3}{0-1}$ Simplify. $\Rightarrow m=\frac{-5}{-1}$ $\Rightarrow m=5$ The point-slope form $\Rightarrow y-y_1=m(x-x_1)$ Substitute $5$ for $m,$ $1$ for $x_1$ and $3$ for $y_1$. $\Rightarrow y-3=5(x-1)$ Use distributive property. $\Rightarrow y-3=5x-5$ Add $3$ to each side. $\Rightarrow y-3+3=5x-5+3$ Simplify. $\Rightarrow y=5x-2$ Hence, the slope-intercept form is $y=5x-2$.
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