Barrons AP Calculus - David Bock

(a) Find A(6) and A(18).
(b) What is the average value of f on the interval 0 ≤ x ≤ 18?
(c) Write the equation of the line tangent to the graph of A at x = 6.
(d) Use this line to estimate the area between f and the x-axis on [0,7].
(e) Give the coordinates of any points of inflection on the graph of A. Justify your answer.