The following are the amounts from the sales slips of a department store (in dollars): 3.45, 4.52, 5.41, 6.00, 5.97, 7.18, 1.12, 5.39, 7.03, 10.25, 11.45, 13.21, 12.00, 14.05, 2.99, 3.28, 17.10, 19.28, 21.09, 12.11, 5.88, 4.65, 3.99, 10.10, 23.00, 15.16, 20.16.
Draw a frequency polygon for these data (start by defining intervals of the data and counting the data points in each interval). Also draw an ogive and a column graph.