The Function F Is One-To-One $$f ( x ) = \frac { 6 x + 5 } { 7 }$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = \frac { 6 x + 5 } { 7 }$$

A) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 \mathrm { x } - 5 } { 6 }$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 } { 6 x - 5 }$
C) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 x + 5 } { 6 }$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 7 } { 6 x + 5 }$