【单选题】Suppose the quantity demanded is 5 units when the price is $1.00. If the price rises to $2.00, the quantity demanded falls to 3 units. The price elasticity of demand is
【单选题】The demand curve for cookies is downward sloping. When the price of cookies is $2, the quantity demanded is 100. If the price rises to $3, what happens to consumer surplus?
【判断题】The law of demand states that, other things equal, when the price of a good rises, the quantity demanded of the good falls, and when the price falls, the quantity demanded rises.