Answer
Please see the graph.
Work Step by Step
$f(x)=7x-14$
$y=7x-14$
$x=7y-14$
$x+14=7y-14+14$
$x+14=7y$
$(x+14)/7 = 7y/7$
$(x+14)/7 =y$
The green line is the original function $f(x)=7x-14$, and the red line is the inverse function $f^{-1}(x) = (x+14)/7$.
