The income elasticity ol Quinlan Qs.6. a) If the quantity demanded remains constant when price changes, then the price elasticity of demand is. and the demand curve is said to be b) If the percentage change in quantity demanded equals the percentage change in price then the price elasticity equals and the demand is said to be c) If the percentage change in quantity demanded is less than the percentage change in price, the price elasticity of demand is and the demand is said to be d) If the quantity demanded changes by an infinitely large percentage in response to a tiny price change, then the price elasticity of demand is and the demand curve is said to be e) When the percentage change in quantity demanded exceeds the percentage change in price, the price elasticity is and demand is said to be