Determine the Average Rate of Change of the Function on the Given

Multiple Choice

Determine the average rate of change of the function on the given interval.
- $$f ( x ) = 3 x ^ { 2 } + 3 \text { on } [ 3,5 ]$$

A) $- 24$
B) $\frac { 5 } { 2 }$
C) 24
D) $\frac { 3 } { 2 }$