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: 19

Answer

$y-0=\dfrac{1}{2}(x-3)$

Work Step by Step

With the given points, $ (3,0)$ and $(-1,-2),$ then \begin{align*} y_1&= 0 ,\\y_2&= -2 ,\\x_1&= 3 ,\text{ and }\\ x_2&= -1 .\end{align*} Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, the slope, $m,$ of the line connecting the two given points is \begin{align*} m&= \dfrac{0-(-2)}{3-(-1)} \\\\&= \dfrac{0+2}{3+1} \\\\&= \dfrac{2}{4} \\\\&= \dfrac{1}{2} .\end{align*} Using $ y-y_1=m(x-x_1) $ or the Point-Slope Form, with $m= \dfrac{1}{2} $ and using the point $ (3,0) $, then \begin{align*} y-0&=\dfrac{1}{2}(x-3) .\end{align*} A Point-Slope Form of the line with the given conditions is $ y-0=\dfrac{1}{2}(x-3) .$
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