Let $f$ and $g$ be **inverse** functions.
The following table lists a few values of $f$, $g$, and $f'$.
$x$ | $f(x)$ | $g(x)$ | $f'(x)$
:-: | :-: | :-: | :-:
$-2$ | $2$ | $5$ | $1$
$5$ | $-2$ | $-4$ | $-\dfrac{1}{2}$
$g'(-2)=$ [[☃ numeric-input 1]]