If the Function Is One-To-One, Find Its Inverse $$f ( x ) = 4 x + 8$$

Multiple Choice

If the function is one-to-one, find its inverse. If not, write ʺnot one-to-one.ʺ
- $$f ( x ) = 4 x + 8$$

A) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } + 8 } { 4 }$
B) $f ^ { - 1 } ( x ) = \frac { x - 8 } { 4 }$
C) not a one-to-one
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 4 } - 8$