Let's graph the inverse functions we had in the last lesson on the same graph and see what happens:
and 
There are two big things I want you to notice:

Notice that every point on f(x) has a reversed partner on g(x). (0, 3) has (3, 0) as a partner and so on. 
So, just remember this:
Every (x, y) has a (y, x) partner. 