#### Answer

$f^{-1}(4)=4$.

#### Work Step by Step

RECALL:
(1) If $(a, b)$ is on the graph of $f(x)$, then $f(a) = b$.
(2) If $f(a)=b$, then $f^{-1}(b)=a$
The given graph contains $(4, 4)$/
This means that $f(4) = 4$ and that $f^{-1}(4)=4$.

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$f^{-1}(4)=4$.

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