Let D(p) be the number of iced cappuccinos sold each week by a coffeehouse when the price is p cents.
a) What does the expression D(225) represent?
b) Do you think that D(p) is an increasing function or a decreasing function? Why?
c) What does the following equation tell you about p? D(p)=180
d) The coffeehouse sells n iced cappuccinos when they charge the average price in their area,
t cents. Thus, D(t)=n . What is the meaning of the following expressions: D(1.5t), 1.5D(t), D(t+50), D(t)+50?
