The average rate of change of a function over an interval [a, b] is given by the formula:
Average Rate of Change = (f(b) - f(a)) / (b - a)
For the interval 5 ≤ x ≤ 7, we have:
Substitute these values into the formula:
Average Rate of Change = (324 - 36) / (7 - 5) = 288 / 2 = 144
Therefore, the average rate of change is 144.
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