18-3 10 15.1 Aggregate demand The aggregate demand curve shows the relationship between the price level and the quantity of output demanded. The aggregate-demand curve shows the quantity of goods and services that households,firms,and the government want to buy at each price level. Economics ECONOMICS MANAGEMENT SCHOOL,TONGJI UNIVERSITYEconomics ECONOMICS & MANAGEMENT SCHOOL, TONGJI UNIVERSITY 18-3 15.1 Aggregate demand • The aggregate demand curve shows the relationship between the price level and the quantity of output demanded. • The aggregate-demand curve shows the quantity of goods and services that households, firms, and the government want to buy at each price level