The graph of the function r(x) = (−x)^3 / 20 is shown here. Draw a graph of the inverse function, r^−1, on the same axes.

Find the inverse function for the function g(x) = 2((5 - x)1/2) - 9 and specify its domain.

I am studying for a precalc exam. Could you explain how to find the inverse of a function such as:  g(x)= (3x-2) ÷ (×+1) What is g -1(x)?