Find and Simplify the Difference Quotient $$\frac { f ( x + h ) - f ( x ) } { h } , h \neq 0$$

Multiple Choice

Find and simplify the difference quotient $$\frac { f ( x + h ) - f ( x ) } { h } , h \neq 0$$ for the given function.
- $$f ( x ) = 2 x + 9$$

A) 2
B) $2 + \frac { 18 } { h }$
C) $2 + \frac { 4 ( x + 9 ) } { h }$
D) 0