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

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