Short answer
9 you just read the graph. The distance traveled is pretty remarkable.
Discussion
1 hour = 60 minutes.
Read the graph until you hit the line when you start from 60 minutes and go vertically until you hit the line. When you hit the line go horizontally and read what you see on the y axis. It should be 9.
There are other ways of solving this problem, but as long as you have the graph, you might just as well use it.
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