Answer :
Answer:
A decrease in the price of tennis balls will result in an increase in the demand for tennis rackets.
Explanation:
From the question, we are informed about how Tennis balls and tennis rackets are commonly used together. In this case, a decrease in the price of tennis rackets will result in an increase in the demand for tennis rackets. This is because both Tennis balls and tennis rackets are reffered to as "substitute goods" in economics. Substitute goods are goods/product that can serve the same purpose to the consumer,
Whenever, there is an increase in the price of one substitute good, then there will be an increase in demand for the other substitute goods.