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To find the rate of change of a linear function, we can use the formula:
rate of change = (change in y)/(change in x)
Looking at the table of values, we can see that the change in y is 3 - (-6) = 9, and the change in x is 3.2 - 2.6 = 0.6.
So, the rate of change is 9/0.6 = 15.
Therefore, the correct answer is m=15.