Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 5 - Section 5.1 - Introduction to Polynomials and Polynomial Functions - Exercise Set - Page 327: 106

Answer

The graph is shown below.

Work Step by Step

The given inequality is $\Rightarrow 2x-3y\lt-6$. Step 1:- Replace the inequality symbol by $=$ and graph the linear equation. $\Rightarrow 2x-3y=-6$. Plug $y=0$ into the linear equation. $\Rightarrow 2x-3(0)=-6$ $\Rightarrow 2x=-6$ Divide both sides by $2$. $\Rightarrow \frac{2x}{2}=\frac{-6}{2}$ Simplify. $\Rightarrow x=-3$ The $x-$ intercept is $-3$, so the line passes through $A=(-3,0)$. Plug $x=0$ into the linear equation. $\Rightarrow 2(0)-3y=-6$ $\Rightarrow -3y=-6$ Divide both sides by $-3$. $\Rightarrow \frac{-3y}{-3}=\frac{-6}{-3}$ Simplify. $\Rightarrow y=2$ The $y-$ intercept is $2$, so the line passes through $B=(0,2)$. Draw a dashed line through these two points because equality is not included. Step 2:- Choose a test point. Let the test point be $C=(0,0)$. Substitute the test point into given inequality. $\Rightarrow 2(0)-3(0)\lt-6$. Simplify. $\Rightarrow 0\lt-6$. The statement is false. Shade the half-plane not containing the test point.
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