The Function F Is One-To-One $$f ( x ) = \frac { - 7 x - 9 } { - 2 x + 6 }$$

Multiple Choice

The function f is one-to-one. Find its inverse.
- $$f ( x ) = \frac { - 7 x - 9 } { - 2 x + 6 }$$

A) $f ^ { - 1 } ( x ) = \frac { - 6 x - 9 } { - 2 x + 7 }$
B) $f ^ { - 1 } ( x ) = \frac { - 7 x - 9 } { - 2 x + 6 }$
C) $f ^ { - 1 } ( x ) = \frac { - 7 x - 7 } { - 2 x + 6 }$
D) $f ^ { - 1 } ( x ) = \frac { - 2 x + 7 } { - 6 x - 9 }$