SACE Stage 2 Economics Practice Exam 2026 - Free Economics Practice Questions and Study Guide

The demand curve is the graphical representation that illustrates the relationship between prices and demand. It reflects how the quantity demanded of a good or service changes as the price changes, typically showing an inverse relationship. As prices decrease, the quantity demanded tends to increase, and vice versa. This relationship is fundamental to understanding consumer behavior and market dynamics.

In contrast, the supply curve represents the relationship between prices and the quantity supplied by producers, showing how much of a good or service suppliers are willing to sell at different price points. Market supply refers to the total supply of a product from all producers in the market, whereas individual supply pertains to the quantity that a single producer is willing to sell. Both supply concepts are essential but do not represent demand, which is why the demand curve is the correct answer in this context.