1. A supply curve represents the data given in the supply schedule. As the price of the commodity increases, the quantum supplied of the commodity also increases. Thus the supply curve has a positive slope from left to right.
2. The quantum supplied of commodity x is represented on X axis. And the price of the commodity is represented on the Y axis. The points such as e, d, c, b and a on the supply curve SS’ , represent various quantities at different prices.