Suppose that when the price of hamburgers decreases, the ruiz family increases their purchases of ketchup. to the ruiz family: hamburgers and ketchup are complements.
<h3>What is complementary goods ?</h3>
Complementary goods can be defined as those goods or product that complement each others because they add value to each others or goods that are combine or use together by consumer or end user.
Hamburgers and ketchup are complementary goods based on the fact that the demand for ketchup increases when the price of hamburgers decreases.
Therefore suppose that when the price of hamburgers decreases, the ruiz family increases their purchases of ketchup. to the ruiz family: hamburgers and ketchup are complements.
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