Calculate the Average Rate of Change of the Given Function $$[ 1,3 ]$$

Multiple Choice

Calculate the average rate of change of the given function over the interval $$[ 1,3 ]$$ . $$\begin{array} { | l | l | l | l | l | } \hline \boldsymbol { x } & 0 & 1 & 2 & 3 \\\hline f ( x ) & 4 & 15 & 5 & - 9 \\\hline\end{array}$$

A) 3
B) 0.5
C) -24
D) 12
E) -12