# Appendix C - Functions - Page 437: 54

(a) $f(2)=1$ (b) $f(-1)=7$

#### Work Step by Step

(a) In the mapping, the domain element $2$ is paired with $1$ in the range. Therefore, $f(2)=1$. (b) In the mapping, the domain element $-1$ is paired with $7$ in the range. Therefore, $f(-1)=7$.

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