What does a supply curve illustrate?

• A. The relationship between price and the quantity demanded.
• B. The comparison between different goods available in the market.
• C. The relationship between price and the quantity supplied.
• D. The changes in demand under various economic conditions.

Answer: (C)

A supply curve illustrates the relationship between price and the quantity supplied. It typically slopes upwards from left to right, indicating that as the price of a good or service increases, producers are willing to supply more of it. This reflects the direct relationship between price and quantity supplied, which is fundamental to understanding supply in a market economy. Producers are incentivized to increase production when prices rise, as higher prices can lead to greater potential revenue and profit, thereby influencing their supply decisions.

In contrast, the first option concerns the demand curve, which illustrates how quantity demanded changes with price. The second option focuses on comparisons among different goods, which isn’t the purpose of a supply curve. The last option discusses demand changes under varying economic conditions, which further diverges from the core concept of supply curves that concentrate specifically on the suppliers' side of the market.