The demand curve show how the quantity of a good demanded by consumers depends on its price. The demand curve is downward sloping;holding other things equal,consumers will want to purchase more of a good the lower is its price. The quantity demanded may also depend on other variables,such as income,the weather,and the prices of other goods. For most products,the quantity demanded increases when income rises.A higher income level shifts the demand curve to the right. The demand curve show how the quantity of a good demanded by consumers depends on its price. The demand curve is downward sloping; holding other things equal, consumers will want to purchase more of a good the lower is its price. The quantity demanded may also depend on other variables, such as income, the weather, and the prices of other goods. For most products, the quantity demanded increases when income rises. A higher income level shifts the demand curve to the right