Consider a market for meals in a school cafeteria. Suppose that in this market only one seller (the school foodservice unit) can sell meals to an unlimited number of students.
The demand is represented by a line: P=12-Q
A. Draw the demand curve in a graph.
B. What is the price elasticity of demand at p=4? at that price, would the school's revenue go up if they increased the price a little bit? Why or why not?