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To determine the mean number of hours students spent on math homework, we need to find the average of all the values on the graph. From the graph, we can see that the values range from 1 hour to 9 hours.
To find the mean, we add up all the values and divide by the number of values. Let's calculate:
(1 + 2 + 3 + 4 + 9)/5 = 19/5 = 3.8
Therefore, the mean number of hours students spent on math homework is 3.8 hours.
So, the correct answer is:
3.8 hours