When purchases of tennis socks decline following an increase in the price of tennis sneakers (other things remaining equal),the relationship between these two items can be described as
A)substitutable.
B)complementary.
C)unique.
D)ordinary.

Question

Quizplus · Accepted Answer

Tennis socks and tennis sneakers are complementary goods because the demand for one decreases when the price of the other increases. This indicates that they are used together, making them complements rather than substitutes or any other category.

When Purchases of Tennis Socks Decline Following an Increase in the Price