Talk:Witching Hour Wake Up Call/@comment-25301067-20150221215231/@comment-6135511-20150221234501

I got 12 too for the answer, but I got it a different way. Find the area under the graph, then divide by the length of x. You now have a rectangle shaped graph, and the y on it is the average of the function.

The area under the graph d(t) = 60.

Distance between right and left x = 5

Divide area by length to give average height of graph = 60 ÷ 5 = 12