Refer to the following distribution of commissions. Monthly Commissions Class Frequencies $600 up to $800 800 up to 1,000 1,000 up to 1,200 1,200 up to 1,400 1,400 up to 1,600 1,600 up to 1,800 1,800 up to 2,000 2,000 up to 2,200 3 7 11 12 40 24 9 4 To plot a cumulative frequency distribution, the first coordinate would be

Refer to the following distribution of commissions. To plot a cumulative frequency distribution, the first coordinate would be