If the Function Is One-To-One, Find Its Inverse $$f ( x ) = \frac { 8 } { x + 8 }$$

Multiple Choice

If the function is one-to-one, find its inverse. If not, write "not one-to-one."
- $$f ( x ) = \frac { 8 } { x + 8 }$$

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