The correct option is
A. X and Y are complementary commodities.
Detailed Explanation
- Understanding the Relationship:
-
Complementary goods are products that are often used together. When the price of one complementary good decreases, the demand for the other good typically increases. This is because the lower price of one good makes it more attractive to consumers, which in turn increases the consumption of the other good that complements it.
-
Analyzing the Scenario:
-
In this question, we are told that the demand for product X increases as the price of product Y decreases. This suggests that consumers are likely purchasing more of product X because it is either used together with product Y or because the decrease in the price of product Y makes it more appealing to buy both.
-
Why Option A is Correct:
- Since the demand for product X increases when the price of product Y decreases, it indicates that these two products are likely complementary. For example, if product X is printers and product Y is ink cartridges, a decrease in the price of ink cartridges (product Y) would lead to an increase in the demand for printers (product X) because consumers are more willing to buy printers if they can get ink at a lower price.
Why the Other Options are Incorrect
- Option B: X and Y are substitute goods:
-
Substitute goods are products that can replace each other. If the price of one substitute good decreases, the demand for the other typically decreases as well. For instance, if the price of coffee (Y) decreases, the demand for tea (X) would likely decrease, not increase. Therefore, this option does not fit the scenario where the demand for X increases as the price of Y decreases.
-
Option C: X and Y are independent goods:
-
Independent goods are those that do not affect each other’s demand. A change in the price of one does not influence the demand for the other. In this case, since the demand for X is increasing due to a price change in Y, it indicates a relationship between the two, making this option incorrect.
-
Option D: X and Y are jointly supplied:
- Jointly supplied goods are products that are produced together. A change in the price of one does not directly affect the demand for the other. For example, if beef and leather are jointly supplied, a price change in beef does not necessarily lead to a change in the demand for leather. This option does not apply to the scenario presented, where the demand for X is directly influenced by the price change of Y.
Summary of Key Points
- Complementary goods are products that are used together; a price decrease in one leads to an increase in demand for the other.
- The scenario indicates that as the price of product Y decreases, the demand for product X increases, confirming they are complementary.
- Substitute goods would show an inverse relationship in demand with price changes, while independent goods would show no relationship.
- Jointly supplied goods do not have a direct demand relationship based on price changes.
This understanding of the relationships between different types of goods is crucial for analyzing consumer behavior in economics.