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: 3

Answer

\begin{align*} \text{$x$-intercept: }& (9, 0) \\ \text{$y$-intercept: }& (0, -3) \end{align*}

Work Step by Step

To find the $x$-intercept of the given equation, $ x-3y=9 ,$ substitute $y=0$ and then solve for $x.$ That is, \begin{align*} x-3(0)&=9 \\ x-0&=9 \\ x&=9 \end{align*} To find the $y$-intercept of the given equation, substitute $x=0$ and then solve for $y.$ That is, \begin{align*} 0-3y&=9 \\ -3y&=9 \\\\ \dfrac{-3y}{-3}&=\dfrac{9}{-3} \\\\ y&=-3 \end{align*} Hence, the intercepts of the given equation are \begin{align*} \text{$x$-intercept: }& (9, 0) \\ \text{$y$-intercept: }& (0, -3) \end{align*}
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