The law of demand is one of the most fundamental concepts in economics. ... The law of demand states that quantity purchased varies inversely with price. In other words, the higher the price, the lower the quantity demanded. This occurs because of diminishing marginal utility.
The law of demand states that all other things being equal, the quantity bought of a good or service is a function of price. ... If the amount bought changes a lot when the price does, then it's called elastic demand. An example of this is ice cream. You can easily get a different dessert if the price rises