Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises: 73

Answer

(a) $f(-2) = 0$ (b) $f(0) = 4$ (c) $f(1) = 2$ (d) $f(4) = 4$

Work Step by Step

RECALL: If $(a, b)$ is on the graph of the function $y=f(x)$, then $f(a) = b$. (a) The graph of the function $y=f(x)$ contains the point $(-2, 0)$. Thus, $f(-2) = 0$. (b) The graph of the function $y=f(x)$ contains the point $(0, 4)$. Thus, $f(0) = 4$. (c) The graph of the function $y=f(x)$ contains the point $(1, 2)$. Thus, $f(1) = 2$. (d) The graph of the function $y=f(x)$ contains the point $(4, 4)$. Thus, $f(4) = 4$.
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