Find a Formula for the Inverse of the Function Described $32 ^ { \circ }$

Multiple Choice

Find a formula for the inverse of the function described below.
- $32 ^ { \circ }$ Fahrenheit $= 0 ^ { \circ }$ Celsius. A function that converts temperatures in Celsius to those in Fahrenheit is $f ( x ) = \frac { 9 } { 5 } x + 32$

A) $f ^ { - 1 } ( x ) = \frac { 9 } { 5 } x + 32$
B) $f ^ { - 1 } ( x ) = \frac { 5 } { 9 } ( x - 32 )$
C) $f ^ { - 1 } ( x ) = \frac { 5 } { 9 } ( x + 32 )$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \mathrm { x } + 32$