The law of supply is a fundamental principle of economic theory. It states that all else equal an increase in price results in an increase in quantity supplied. In other words there is a direct relationship between price and quantity. Quantities respond in the same direction as price changes. This means that producers are willing to offer more products for sale on the market at higher price by increasing production as a way of increasing profit.
In the figure OY is vertical axis OX is horizontal axis. Here P1, P2, Q1, Q2 are four point show price quantity combination. The supply curve / slopes upward from left to right indicating that less quantity is offered for sale at lower price and more at higher prices by the sellers not supply curve is usually positively sloped.