West Middle School has classes of many different sizes during first period. The number of students in each class is shown. 9,23,18,14,20,26,14,18,18,12,8,13,2 1,22,28,10,7,19,24,20.

a. Hank made a histogram using intervals 6-10, 11-15, and so on. How many bars did his histogram have? What was the height of the highest bar?

b. Lisa made a histogram using intervals of 6-10,11-15, and so on. How many bars did her histogram have? What was the height of the highest bar?

c. Besides a histogram, what are some other ways you could display these data?