What is the relationship between income and demand?

The relationship between income and demand is primarily governed by the concept of normal goods in economics. When income increases, consumers typically have more purchasing power, allowing them to buy more goods and services. This heightened capacity to spend often results in an increase in demand for various products.

For normal goods, which are items that people tend to buy more of as their income rises, this relationship is direct and positive; as income climbs, so does demand. Conversely, if we consider inferior goods (items that people buy less of as their income rises), the opposite would hold true.

In this case, the correct answer identifies that an increase in income leads to an increase in demand, reflecting the behavior of consumers in response to their economic conditions. Understanding this relationship is crucial for analyzing market behavior and forecasting demand changes based on income fluctuations.