Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Appendix C - Functions - Page 437: 55

Answer

(a) $f(2)=3$ (b) $f(-1)=-3$

Work Step by Step

(a) To evaluate $f(2)$ using the graph, we find $2$ on the x-axis. From $2$ on the x-axis, we move up vertically until the graph of f is reached. From this point, we then move horizontally towards the y-axis which gives a corresponding value of $3$. Therefore, $f(2)=3$. (b) To evaluate $f(-1)$ using the graph, we find $-1$ on the x-axis. From $-1$ on the x-axis, we move down vertically until the graph of f is reached. From this point, we then move horizontally towards the y-axis which gives a corresponding value of $-3$. Therefore, $f(-1)=-3$.
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