Find the inverse for the function:
$\begin{array}{r}
f(x)=\frac{7 x-17}{4} \\
f^{-1}(x)=[?] x+
\end{array}$
$\begin{array}{r}
f(x)=\frac{7 x-17}{4} \\
f^{-1}(x)=[?] x+
\end{array}$