Final answer:
The cross-price elasticity of demand measures the relationship between elasticity and complements/substitute goods. Substitute goods have positive cross-price elasticities, while complement goods have negative cross-price elasticities.
Step-by-step explanation:
The relationship of elasticity to complements/substitute goods is represented by the cross-price elasticity of demand. In economics, cross-price elasticity measures the responsiveness of the quantity demanded of one good to a change in the price of another good. Substitute goods have positive cross-price elasticities, meaning that if the price of one substitute good increases, the quantity consumed of the other substitute good will increase. Complement goods have negative cross-price elasticities, indicating that if the price of one complement good increases.