From the given fx x 2 9x a 2 b 7. Calculate the change in function value. The first point is 00 and the second point is 16.
Use the slope formula to find the slope which is the rate of change.
Find the ratio of the changes. The units on a rate of change are output units per input units The average rate of change between two input values is the total change of the function values output values divided by the change in the input values. The average rate of change can be calculated with only the times and populations at the beginning and end of the period. Growth rate in real GDP.