If the price of good A decreases by 10 percent and the quantity demanded of good B increases by 10 percent, this is evidence that goods A and B are
A)substitute for one another.
B)complement goods to one another.
C)both inferior goods.
D)both normal goods.
E)not related.

Question

Quizplus · Accepted Answer

When the price of good A decreases and the quantity demanded of good B increases, it indicates that the two goods are complements. This means that consumers buy more of good B when good A becomes cheaper, suggesting that they are used together.

If the Price of Good a Decreases by 10 Percent