Question

Which function, g or h, is the inverse of function f, and why?

Answer 1

The correct answer is the second one.

In fact, the graphs of a function and its inverse are symmetrical with respect to the line $y = x$.

Such a symmetry has the effect of mapping point $(x,y)$ to point $(y,x)$

Answer 2

I believe the answer would be h. For every value (x,y) of the function f, h has the inverse (y,x).