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

Multiple Choice

Find the difference quotient, $\frac { f ( x + h ) - f ( x ) } { h }$ . $f ( x ) = \frac { 9 } { x }$

A) $\frac { f ( x + h ) - f ( x ) } { h } = - \frac { 9 } { x ( x + h ) }$
B) $\frac { f ( x + h ) - f ( x ) } { h } = \frac { 9 } { x + h }$
C) $\frac { f ( x + h ) - f ( x ) } { h }$ = 9
D) $\frac { f ( x + h ) - f ( x ) } { h }$ = 1