Demand Function

The demand function is a mathematical representation of the maximum rate of demand as the dependent variable and its various determinants. A simple example would make the amount of something demanded a function of its relative price and buyers' incomes. The demand curve is a two-dimensional representation of this function in which responses to changes in price are seen as movements along the demand curve and responses to changes in income are seen as shifts of the entire demand curve. See Law of Demand.

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