Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Mid-Chapter Check Point: 4

Answer

Not a function The domain is $(-3, 4]$. The range is $[-1, 2]$.

Work Step by Step

Some vertical lines (such as $x=0$) will pass through the graph on more than one point. Thus, the graph does not represent a function. The x-values are from $-3$ to $4$ (but not including -3 itself as a hole was used to plot the point). Thus, the domain is $(-3, 4]$. The y-values range from $-1$ to $2$. Thus, the range is $[-1, 2]$.
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