Every 2 minutes, the height of a glider decreases by 8 feet. The initial height was 47 feet. A student sketches a graph of the height of the glider, H, versus time in minutes, m. The m-axis will show values from 0 to 10.

If the student counts by 5's, what should be the largest value on the H-axis of his or her graph so that the scale is the most appropriate for the given information?

Drag and drop the correct number into the box.
5,10,20,45,50,55,80
Please help!