OpenSAT

To find the inverse function, $f^{-1}(x)$, we first swap $x$ and $y$ in the equation $y = f(x)$: $x = \frac{1}{2}y - 3$. Solving for $y$, we get $2x + 6 = y$. Thus, $f^{-1}(x) = 2x + 6$. Substituting 5 for $x$ in this equation gives $f^{-1}(5) = 2(5) + 6$, or $f^{-1}(5) = 16$.