3. Using the midpoint method The following graph shows two known points (X and Y) on a demand curve for apples. 10 Y Demand PRICE (Dollars per pound) 10 20 30 40 50 70 90 100 QUANTITY (Thousands of pounds of apples) According to the midpoint method, the price elasticity of demand for apples between point X and point Y is approximately , which suggests that the demand for apples is between points X and V