A Size 8 Dress in Country C Is $f ^ { - 1 } ( x ) = \frac { x - 16 } { 2 }$

Multiple Choice

A size 8 dress in Country C is size 48 in Country D. A function that converts dress sizes in Country C to those in Country D is f(x) =2( x +16) . Find a formula for the inverse of this function.

A) $f ^ { - 1 } ( x ) = \frac { x - 16 } { 2 }$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \mathrm { x } - 16$
C) $f ^ { - 1 } ( x ) = \frac { x } { 2 } + 16$
D) $f ^ { - 1 } ( x ) = \frac { x } { 2 } - 16$