Suppose the Graph Shows the Energy Usage in Megawatts for One

Suppose the graph shows the energy usage in megawatts for one day for a large university campus. The daily energy consumption for the campus is measured in megawatt-hours and is found by calculating the area of the region between the graph and the horizontal axis. Estimate, to the nearest 10 megawatt-hours, the daily energy consumption using eight right rectangles.

A) 760 megawatt-hours
B) 730 megawatt-hours
C) 830 megawatt-hours
D) 790 megawatt-hours
E) 1050 megawatt-hours