Determine Whether the Given Function Is One-To-One $$f ( x ) = ( x - 9 ) ^ { 2 }$$

Multiple Choice

Determine whether the given function is one-to-one. If so, find a formula for the inverse.
- $$f ( x ) = ( x - 9 ) ^ { 2 }$$

A) $f ^ { - 1 } ( x ) = \frac { 1 } { \sqrt { x + 9 } }$
B) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \sqrt { \mathrm { x } } + 9$
C) $f ^ { - 1 } ( x ) = \sqrt { x + 9 }$
D) Not a one-to-one function