Algebra 2 Common Core

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

Chapter 2 - Functions, Equations, and Graphs - 2-4 More About Linear Equations - Practice and Problem-Solving Exercises - Page 87: 37

Answer

Graph of $y=\dfrac{2}{3}x+4$

Work Step by Step

The $x-$intercept is the value of $x$ when $y=0.$ Setting $y=0,$ the $x$-intercept of the given equation, $ y=\dfrac{2}{3}x+4 ,$ is \begin{align*} 0&=\dfrac{2}{3}x+4 \\\\ 0-4&=\dfrac{2}{3}x+4-4 \\\\ -4&=\dfrac{2}{3}x \\\\ \left(\dfrac{3}{2}\right)(-4)&=\left(\dfrac{2}{3}x\right)\left(\dfrac{3}{2}\right) \\\\ -6&=x .\end{align*} The $x$-intercept is $ \left( -6,0 \right) $. The $y-$intercept is the value of $y$ when $x=0.$ Setting $x=0,$ the $y$-intercept of the given equation is \begin{align*} y&=\dfrac{2}{3}(0)+4 \\\\ y&=0+4 \\ y&=4 .\end{align*} The $y$-intercept is $ (0,4) $. By connecting the intercepts, the graph of the given equation is determined.
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