Find the Domain of the Function $$f ( x ) = - 5 x + 9$$

Multiple Choice

Find the domain of the function.
- $$f ( x ) = - 5 x + 9$$

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