What is an inferior good in economics and how does it differ from normal goods in terms of consumer demand and purchasing behavior?

An inferior good in economics is a product that people buy less of when their income increases. This is because consumers tend to prefer higher-quality goods as they become wealthier. In contrast, normal goods are products that people buy more of as their income rises. This difference in consumer behavior leads to a unique relationship between income levels and demand for inferior goods compared to normal goods.