Final answer:
To find the average rate of change of function f over the interval [68, 136], calculate the difference in the function values and divide it by the difference in the input values.
Step-by-step explanation:
To find the average rate of change of function f over the interval [68, 136], we need to calculate the difference in the function values and divide it by the difference in the input values. The average rate of change is the slope of the secant line connecting the two points of the interval.
Let's assume the function values at 68 and 136 are f(68) and f(136) respectively. The difference in the function values is f(136) - f(68). The difference in the input values is 136 - 68. Finally, we divide the difference in function values by the difference in input values:
Average Rate of Change = (f(136) - f(68))/(136 - 68)