Find the Inverse of the Function $$f ( x ) = \frac { 7 } { x + 7 }$$

Multiple Choice

Find the inverse of the function.
- $$f ( x ) = \frac { 7 } { x + 7 }$$

A) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { - 7 \mathrm { x } + 7 } { \mathrm { x } }$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 + 7 \mathrm { x } } { \mathrm { x } }$
C) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { \mathrm { x } } { 7 + 7 \mathrm { x } }$
D) Not a one-to-one function