Consumer surplus is closely related yo the demand curve for a product. To see how they are related let’s continue our example and consider the demand curve for this rare Elvis Presley album. We begin by using the willingness to pay of the four possible buyers to find the demand schedule for the album. The table in the demand schedule that corresponds to table. If the price is above $100 the quantity demanded in the market is because no buyer is willing to pay that much. If the price between and the quantity demanded is because only John is willing to pay such a high price. If the price is between and the quantity demanded is because both john and Paul are willing to pay the price. We can continue this analysis for other prices as well. In this way the demand schedule is derived from the willingness to pay of the four possible buyers. The demand curve that corresponds of this demand schedule. Note the relationship between the height of the demand curve and t...