College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 2 - Section 2.4 - Linear Functions - 2.4 Exercises - Page 211: 21

Answer

See graph. Domain: $\{-2\}$ Range: $(-\infty,\infty)$

Work Step by Step

First we solve $2x+4=0$: $2x+4=0$ $2x=-4$ $x=-2$ We graph $x=-2$ by recognizing that it represents a vertical line through the point $(-2,0)$. See graph for result. Since the graph is a vertical line, we know that the domain is restricted to $-2$, while the range is all real numbers: Domain: $\{-2\}$ Range: $(-\infty,\infty)$
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