Demand curve

Demand curve is a line that shows the relationship between price and quantity demanded of a certain good or service on a graph, with quantity on the horizontal axis and the price on the vertical axis.

Definition

According to Principles of Economics by Timothy Taylor (3rd edition),

Demand curve. A line that shows the relationship between price and quantity demanded of a certain good or service on a graph, with quantity on the horizontal axis and the price on the vertical axis.