Let $f ( x ) = x ^ { 2 }$

Multiple Choice

Let $f ( x ) = x ^ { 2 }$ Which of the following is equal to $\lim _ { h \rightarrow 0 } \frac { f ( 3 + h ) - f ( 3 ) } { h }$ ?

A) -6
B) -2
C) 2
D) 6
E) Does not exist