Question

if suddenly the price of a complementary good, such as peanut butter, doubled, what might happen to the demand curve for chocolate? the curve would shift to the right. the curve would shift to the left. the curve would not move. the curve would move down.

Explanation:

Complementary goods are used together. When the price of a complementary good (peanut butter) doubles, the quantity demanded of peanut butter decreases. Since chocolate is consumed along with peanut butter, the demand for chocolate also decreases at each price level, causing the demand curve for chocolate to shift to the left.

Answer:

The curve would shift to the left.