Shift in the Demand Curve

Complementary Goods: Complementary goods are products that are used together. For example, if there is an increase in the demand for hot dogs, there will also be an increase in the demand for hot dog buns.

Substitute Goods: Substitute goods are products that can be used interchangeably. If there is an increase in the price of beef, people may start buying more chicken instead.

Normal Goods: Normal goods are products whose demand increases as income increases. For example, luxury cars would be considered normal goods because people tend to buy more of them when their income rises.