The Function F Is One-To-One $$f ( x ) = \frac { 4 } { 7 x - 5 }$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = \frac { 4 } { 7 x - 5 }$$

A) $f ^ { - 1 } ( x ) = \frac { 4 + 5 x } { 7 x }$
B) $f ^ { - 1 } ( x ) = \frac { - 5 x - 4 } { 7 x }$
C) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 \mathrm { x } - 5 } { 4 }$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 4 + 5 \mathrm { y } } { 7 \mathrm { y } }$