- The inverse demand curve measures: a) the price at which a given quantity is demanded. (b) the price at which any quantity is offered. c) the evolution of the quantities requested, all other things being equal - A Giffen good is a good whose: a) demand decreases when its price increases. b) demand increases when its price increases. c) demand increases when its price decreases. - The revenue expansion path is to the Engel curve what the price expansion path is to: a) the demand curve. b) the consumption-income curve. c) the indifference curve.