What is law of Supply?

[Md. Alamgir Hossan]

In a specific period, when other things constant, If the price of any goods and service is increased the supply of that goods/service will be increased. On the other hand, If the price of any goods and service is decreased the supply of that goods/service will be also decreased, that types of positive relationship between quantity supply and price is said to be a supply law.
Symbolically, 
P↑S↑   
P↓S↓