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  • Demand Curve

  • Inverse Demand Function: Price as a Function of Quantity

Direct Demand Function: Quantity as a Function of Price (Q = D(P))

The direct demand function, denoted as Q=D(P)Q = D(P), expresses the quantity demanded (Q) as a function of price (P). Consistent with the downward-sloping nature of the demand curve, this is a strictly decreasing function. It is derived by rearranging the inverse demand function, P=f(Q)P = f(Q), to solve for Q. Thus, the function D(P)D(P) is the mathematical inverse of the inverse demand function f(Q)f(Q). This direct functional form is necessary for the mathematical determination of the market equilibrium price by equating it with the direct supply function.

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Introduction to Microeconomics Course

The Economy 2.0 Microeconomics @ CORE Econ

Ch.7 The firm and its customers - The Economy 2.0 Microeconomics @ CORE Econ

Ch.8 Supply and demand: Markets with many buyers and sellers - The Economy 2.0 Microeconomics @ CORE Econ

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