Use Composition to Verify Whether or Not the Inverse Is $$f ( x ) = 9 x - 9 , f ^ { - 1 } ( x ) = \frac { 1 } { 9 } x + 1$$

True/False

Use composition to verify whether or not the inverse is correct.
- $$f ( x ) = 9 x - 9 , f ^ { - 1 } ( x ) = \frac { 1 } { 9 } x + 1$$