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Question

The supply curve of a firm is given by the equation q=250p-250. If the price decreases by 2 units, the quantity .

A
increases by 250
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B
decreases by 250
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C
increases by 500
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D
decreases by 500
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Solution

The correct option is D decreases by 500
Let q be the quantity supplied at a price of p. Suppose the price decreases by 2 units to p-2. If q' is the new quantity, then

q'=250(p-2)-250
q'=250p - 750
q'=(250p - 250) - 500
q'=q-500

Thus, the quantity decreases by 500.

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