To fill: The average rate of change of function between and .
The average rate of change is .
The given function is,
The average rate of change of a function is the slope of the scant line between the and .
Average rate of change of function between. and .
Substitute 1 for a and 5 for b in equation (2)
For substitute 5 for x in equation (1)
For substitute 1 for x in equation (1)
Again substitute 25 for and 1 for in equation (3).
Thus, the average rate of change is .
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