4 1/3 - 2 3/4 well i can not get the question right

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?

Which expression is equivalent to 2x^2+7x+4?

40 describe the outliers from the scatter plot.