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