October Madness The scatter plot shows the number of shares traded each day during O...

October Madness The scatter plot shows the number of shares traded each day during October of 1987. The behavior of the graph on October 19 and 20 has been referred to as “October Madness.”

a. Calculate the percentage change and average rate of change in the number of shares traded per trading day between October 1 (when 193.2 million shares were traded) and October 30, 1987 (when 303.4 shares were traded).

b. Draw a secant line whose slope is the average rate of change between October 1 and October 30, 1987.

c. Write a sentence describing how the number of shares traded changed throughout the month. How well does the average rate of change calculated in part a reflect what occurred throughout the month?