Calculate the Average Rate of Change of the Given Function $[ - 5 , - 3 ]$

Multiple Choice

Calculate the average rate of change of the given function over the interval $[ - 5 , - 3 ]$ . $$\begin{array} { | l | l | l | l | l | } \hline \boldsymbol { x } & - 5 & - 4 & - 3 & - 2 \\\hline f ( x ) & - 10.9 & - 0.5 & - 1.1 & - 7.2 \\\hline\end{array}$$

A) 6
B) -12
C) 3.85
D) -3.35
E) 4.9