Law of demand

States that the quantity demanded of a good falls as its price rises, so the demand function is decreasing in price. It is used to describe consumer behaviour and to sketch demand curves.

Q_x = f(P_x), \quad f'(P_x) < 0

What the symbols mean

quantity demanded of good x
price of good x
demand function mapping price to quantity demanded
derivative of the demand function with respect to price, negative under the law

About this formula

  • FieldEconomics and finance
  • TopicMicroeconomics
  • LevelHigh school
  • Also calleddemand function, quantity demanded falls as price rises, inverse relationship price quantity demanded, downward sloping demand curve
  • SourceWikidata Q3875012

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