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Constructing a Demand Curve from Willingness to Pay

A market demand curve is constructed by arranging all potential consumers in descending order based on their willingness to pay (WTP). When this ordered WTP is plotted against the number of consumers, it forms a downward-sloping graph. This curve illustrates that for any given price, the quantity demanded is the total number of consumers whose WTP is at or above that price. For example, in a textbook market, the first student in the sequence might have a WTP of $20, while the 20th student has a WTP of $10.

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Updated 2026-05-02

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