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Which two ratios form a proportion?
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You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

The system of equations graphed below has how many solutions?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?