Find a formula for the inverse of the function described below.
-A size 4 dress in Country $C$ is size 42 in Country D. A function that converts dress sizes in Country $C$ to those in Country $D$ is $f ( x ) = x + 38$.
A) $f ^ { - 1 } ( x ) = x - 38$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { - 38 }$
C) $f ^ { - 1 } ( x ) = x + 38$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 38 }$

Question

Quizplus · Accepted Answer

To find the inverse function, $f^{-1}(x)$, we solve the equation $y = x + 38$ for $x$, which gives $x = y - 38$. Thus, the inverse function is $f^{-1}(x) = x - 38$.

Find a Formula for the Inverse of the Function Described CCC

Find a Formula for the Inverse of the Function Described $C$