Positive relationship between price and quantity supply is the law of supply.

law of supply can be expressed in three ways.

• Supply schedule
• Supply curve
• Supply equation

• The supply curve has a positive slope according to the law of supply.
• The supply equation has a positive relationship
• The positive slope of the supply equation can be illustrated with following equation
• The reason for the positive relationship between the price quantity supply or the law of supply the
• is law of increasing opportunity cost.
• The total of each individual suppliers in the market is explained as market supply.