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: 4

Answer

The point slope form is $y-5=-2(x+2)$.

Work Step by Step

The given points are $(x_1,y_1)=(-2,5)$ and $(x_2,y_2)=(1,-1)$ Slope $\Rightarrow m =\frac{y_2-y_1}{x_2-x_1}$ Substitute all the values. $\Rightarrow m =\frac{-1-5}{1-(-2)}$ Simplify. $\Rightarrow m =\frac{-1-5}{1+2}$ $\Rightarrow m =\frac{-6}{3}$ $\Rightarrow m =-2$ The point-slope form. $\Rightarrow y-y_1=m(x-x_1)$ Substitute all the values. $\Rightarrow y-(5)=-2(x-(-2))$ Simplify. $\Rightarrow y-5=-2(x+2)$ Hence, the point slope form is $y-5=-2(x+2)$.
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