Find the average rate of change of the function from $$x _ { 1 } \text { to } x _ { 2 }$$
-From April through December 2000, the stock price of QRS Company had a roller coaster ride. The chart below indicates the price of the stock at the beginning of each month during that period. Find the monthly average rate of change in price between June and September. $\begin{array}{l|r}
\text { Month } & \text { Price } \
\hline \text { April }(x=1) & 115 \
\text { May } & 109 \
\text { June } & 88 \
\text { July } & 99 \
\text { August } & 96 \
\text { September } & 112 \
\text { October } & 92 \
\text { November } & 84 \
\text { December } & 64
\end{array}$

A) $\$ 8.00$ per month
B) $- \$ 8.00$ per month
C) $\$ 12.00$ per month
D) $- \$ 12.00$ per month

Question

Find the average rate of change of the function from $$x _ { 1 } \text { to } x _ { 2 }$$
-From April through December 2000, the stock price of QRS Company had a roller coaster ride. The chart below indicates the price of the stock at the beginning of each month during that period. Find the monthly average rate of change in price between June and September. $\begin{array}{l|r}
\text { Month } & \text { Price } \
\hline \text { April }(x=1) & 115 \
\text { May } & 109 \
\text { June } & 88 \
\text { July } & 99 \
\text { August } & 96 \
\text { September } & 112 \
\text { October } & 92 \
\text { November } & 84 \
\text { December } & 64
\end{array}$

A) $\$ 8.00$ per month
B) $- \$ 8.00$ per month
C) $\$ 12.00$ per month
D) $- \$ 12.00$ per month

Quizplus · Accepted Answer

The average rate of change from June to September is calculated by taking the difference in stock prices between September and June, and then dividing by the number of months between them. The price in June is $88 and in September is $112. The difference is $112 - $88 = $24. There are 3 months between June and September. So, the average rate of change is $24 / 3 = $8.00 per month.

Find the Average Rate of Change of the Function From x