.   Calculate the average rate of change of a function, f(x) = 3x + 2 as x changes from 1 to 4.

1273.   Calculate the average rate of change of a function, f(x) = 3x + 2 as x changes from 0 to 5.

   Calculate the average rate of change of a function, f(x) = x - 10 as x changes from 3 to 8.

   Calculate the average rate of change of a function, f(x) = x - 10 as x changes from 1 to 3.