Algebra 2 Common Core

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

Chapter 2 - Functions, Equations, and Graphs - Mid-Chapter Quiz - Page 89: 19

Answer

$y-2=3(x+4)$

Work Step by Step

With the given points, $(-4,2)\text{ and } (-3,5),$ then \begin{align*} y_1&= 2 ,\\y_2&= 5 ,\\x_1&= -4 ,\text{ and }\\ x_2&= -3 .\end{align*} Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, the slope, $m,$ of the line is \begin{align*}\require{cancel} m&=\dfrac{2-5}{-4-(-3)} \\\\&= \dfrac{2-5}{-4+3} \\\\&= \dfrac{-3}{-1} \\\\&= 3 .\end{align*} Using $ y-y_1=m(x-x_1) $ or the Point-Slope Form of linear equations, with the point $(-4,2)$ and $m=3,$ then \begin{align*} y-2&=3(x-(-4)) \\\\ y-2&=3(x+4) .\end{align*} Hence, an equation of the line in Point-Slope Form is $ y-2=3(x+4) .$
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