Given the function f(x), you can get a picture of the graph of it inverse f^-1(x) by flipping the original graph f f(x) over the

a. y=-1
b x= -1
c y=x

The inverse of a function produced the reverse coordinates of the parent function.  For every (x,y) of the parent function, the inverse will produce points (y,x).  This has the effect of rotating the parent function about the line:

y=x