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

Multiple Choice

Compute and simplify the difference quotient $\frac { f ( x + h ) - f ( x ) } { h } , h \neq 0$
- $$f ( x ) = 4 x - 15$$

A) 4
B) 15
C) $\frac { 15 } { 4 }$
D) $- 15 \mathrm {~h}$