A graph showing the relationship between the price of a good and the amount that buyers are willing to and able to purchase at a variety of prices is the quantity demanded, demand curve,demand schedule or law of demand. the claim that, with other things being equal, the quantity demanded of a good falls when the price of that good rises is the quantity demanded, demand curve, demand schedule or law of demand. The amount of a good that buyers are willing and able to purchase at a given price is the quantity demanded, demand curve, demand schedule or law of demand. A table showing the relationship between the price of a good and the amount that buyers are willing and able to purchase at a variety is the quantity demanded, demand curve, demand schedule or law of demand.