Find and Simplify the Difference Quotient of F $$\frac { f ( x + h ) - f ( x ) } { h }$$

Multiple Choice

Find and simplify the difference quotient of f, $$\frac { f ( x + h ) - f ( x ) } { h }$$ $\mathbf { h } \neq 0$ , for the function.
-f(x) = 5x - 8 A) 0
B) $5 + \frac { 10 ( \mathrm { x } - 8 ) } { \mathrm { h } }$
C) 5
D) $5 + \frac { - 16 } { \mathrm {~h} }$