Like the law of demand, the law of supply demonstrates the quantities that will be
sold at a certain price. But unlike the law of demand, the supply relationship
shows an upward slope. This means that the higher the price, the higher the
quantity supplied.Producers supply more at a higher price because selling a higher quantity at a higher price increases revenue.
A, B and C are points on the supply curve. Each point on the curve reflects a
direct correlation between quantity supplied (Q) and price (P). At point B, the
quantity supplied will be Q2 and the price will be P2, and so on.