Calculate the Average Rate of Change of the Given Function $[ 2,6 ]$

Multiple Choice

Calculate the average rate of change of the given function over the interval $[ 2,6 ]$ . $$\begin{array} { | l | l | l | l | } \hline t \text { (month) } & 2 & 4 & 6 \\\hline \boldsymbol { R } ( t ) ( \text { ( millions) } & 13.2 & 13.8 & 12.6 \\\hline\end{array}$$

A) -$300,000
B) -$0
C) $150
D) -$150,000
E) $150,000