Here’s what you do to find the inverse of a function. First, put y in the place of f(x) to make a more
familiar-looking equation form:
Second, solve the equation for x in terms of y:
INVERSE FUNCTIONS
Third, put f−1(x) in the place of x and put x in the place of y:
(D) 3 x −3
(E) 3 x −9
To find the inverse of a function:
1. Replace f(x) with y.
2. Solve the equation for x in terms of y.
3. Replace x with f−1(x) and replace y with x.
Graphs of inverse functions are symmetric about the line y = x.
The slopes of the lines of inverse functions are reciprocals.