The law of supply

Why does supply slope upward?

The supply curve

2468101224681012QuantityPrice ($)Supply (S)

The supply curve slopes upward: higher price → higher quantity supplied

Individual vs. market supply

Movement along vs. shift of supply

2468101224681012QuantityPrice ($)S₁ (Original)S₂ (Increase)S₃ (Decrease)

Shift right = increase in supply; Shift left = decrease in supply

Determinants of supply (supply shifters)

Input prices

Technology

Taxes and subsidies

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Production alternatives

The supply schedule

Supply function (linear)

Inverse supply function

The supply curve as marginal cost

Comparing demand and supply

AP exam tips for 1.5

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Common mistakes

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Key equations

Vocabulary