The graph illustrated below displays the relationship between the amount A(t) (in millions of
gallons) of reclaimed water used by a county each year and the time t (in years) since 1940. Sketch a
graph of the rate of change of the amount, A'(t) of reclaimed water with respect to time. Don't
worry about being too precise, it is only a sketch but be sure to plot the t-intercepts as accurately as
possible.