The law of supply is a direct relation between price and quantity. The price of the commodity rises, the quantity of supply also increases because producers get profit, and the price of the commodity rises. That's why they produce more. If the price of the commodity decreases, the supply of the quantity declines because the expectation of profit of the producer decreases, so they reduce the production of the commodity.

Assumption
1) The price of other commodities is constant.
2) The state of technology has not changed.
3) The price of factors of production is constant.
4) The taxation laws remain the same.
5) The producer’s objectives are constant.

Table

Diagram

Explain
(X) axis quantity of demand units, (y) axis price of the commodity. When the price of a commodity increases 2 to 3, the quantity of supply increases 10 to 15. because of producer encouragement to produce more commodities for price rise, so their profit, that's why their price increases, and the quantity of supply also increases. This is called the law of supply.