In [[economics]], an '''inverse demand function''' is the [[inverse function]] of a [[demand curve|demand function]]. The inverse demand function maps the quantity of output demanded to the market price (dependent variable) for that output. Quantity demanded, Q, is a function of price; the inverse demand function treatsviewing price as a function of quantity demanded, and is also called the price function.<ref>Samuelson,{{Cite Wbook|url=https://www.worldcat.org/oclc/884922812|title=Intermediate andmicroeconomics Marks, S Managerial Economics: 4thwith edcalculus|last=R.|first=Varian, pageHal|publisher=|year=|isbn=9780393123982|edition=First 35.edition|___location=New Wiley 2003.York|pages=115|oclc=884922812}}</ref>
Quantity demanded, Q, is a function of price; the inverse demand function treats price as a function of quantity demanded, and is also called the price function.<ref>Samuelson, W and Marks, S Managerial Economics 4th ed. page 35. Wiley 2003.</ref>
Note that the inverse demand function is not the reciprocal of the demand function—the word "inverse" refers to the mathematical concept of an inverse function.
