Which expression can be used to determine the average rate of change in f of x over the interval left bracket 2 comma 9 right bracket ?

The average rate of change of a function from x = 2 to x = 9 is the change in the function’s values divided by the change in x: [f(9) − f(2)]/(9 − 2). Therefore, the correct choice is the fraction with numerator f(9) − f(2) and denominator 9 − 2.

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