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On a standard demand and supply graph in this model, which axis carries quantity and which carries price?
AQuantity on the vertical axis, price on the horizontal axis
BBoth quantity and price are placed on the horizontal axis
CQuantity on the horizontal axis, price on the vertical axis
DBoth quantity and price are placed on the vertical axis
Answer & Solution
Correct answer: C. Quantity on the horizontal axis, price on the vertical axis
1. A demand curve for gasoline plots quantity demanded against price.
2. Quantity is placed on the horizontal axis and price on the vertical axis.
3. This reverses the usual math convention of putting the independent variable on the horizontal axis, since price is treated as independent here.
4. Options A, B, and D misplace one or both variables.
_Source: OpenStax Principles of Macroeconomics for AP Courses (CC BY 4.0), Ch 3 "Demand and Supply", section 3.1 | Demand, Supply, and Equilibrium in Markets for Goods and Services_
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