Solve the Problem $- 2$ Dress in Country $\mathrm { C }$

Solve the problem.
-A size $- 2$ dress in Country $\mathrm { C }$ is size $- 20$ in Country D. A function that converts dress sizes in Country C to those in Country $D$ is $f ( x ) = x - 22$ . Find a formula for the inverse of the function described.

A) $f ^ { - 1 } ( x ) = x + 22$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 22 }$
C) $f ^ { - 1 } ( x ) = x - 22$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { - 22 }$