Find the Domain of the Function $$f ( x ) = \frac { 1 } { x - 9 }$$

Multiple Choice

Find the domain of the function.
- $$f ( x ) = \frac { 1 } { x - 9 }$$

A) $( - \infty , 9 ) \cup ( 9 , \infty )$
B) $( - \infty , \infty )$
C) $( 9 , \infty )$
D) $( - \infty , 0 ) \cup ( 0 , \infty )$