What is the coefficient of x?

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?

In the diagram below, abc is congruent to dec what is the value of x

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units