Demand:
It refers to that quantity of a product which a consumer is willing and able to buy at each possible price and given period of time.

Supply:
It refers to that quantity of a product which a seller offer for sale in the market at given price and given period of time.

" Factors affecting demand and supply "
Demand:
1.Price of the product
2.price of related products
3.income of consumer
4.Taste and preference of the consumer
5.expectation of change in the price in future.

Supply:
1.price
2.cost of production
3.technology
4.transport conditions
5.government policies
  "Laws of demand and supply"
Supply:

The Law of Supply is the direct relationship between price and quantity supplied. If everything else remains the same, then an increase in price results in an increase in quantity supplied. The positive relationship is the reason for the supply curve sloping upwards. The rationale for the positive correlation between price and quantity supplied is based on the potential increase in profitability that occurs with an increase in price.



Demand:

The law of demand states that quantity purchased varies inversely with price. In other words, the higher the price, the lower the quantity demanded. The reason for this phenomenon is that consumers' opportunity cost increases, so they must give something else up or switch to a substitute product.