Demand curve Price of Novers The line di shows how 10 Emma's purchases of 13,8 novels depend on the price of novels when 6 her income is held constant Because the Demand, D1 price and the quantity demanded are negatively related, the demand curve slopes 5 1317 25 downward Quantity of Novels PurchasedDemand Curve Quantity of Novels Purchased 5, 10 9, 9 13, 8 17, 7 21, 6 25, 5 0 2 4 6 8 1 0 1 2 0 5 9 1 3 1 7 2 1 2 5 Price of Novels Demand,D1 The line D1 shows how Emma’s purchases of novels depend on the price of novels when her income is held constant. Because the price and the quantity demanded are negatively related, the demand curve slopes downward