The yield, Y , of an apple orchard (in bushels) as a function of the amount, a, of fertilizer (in pounds) used on the orchard is shown in Figure 1.100.
(a) Describe the effect of the amount of fertilizer on the yield of the orchard.
(b) What is the vertical intercept? Explain what it means in terms of apples and fertilizer.
(c) What is the horizontal intercept? Explain what it means in terms of apples and fertilizer.
(d) What is the range of this function for 0 ≤ a ≤ 80?
(e) Is the function increasing or decreasing at a = 60?
(f) Is the graph concave up or down near a = 40?
