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Supply schedule (SS) and supply curve

A tabular representation of the relationship between price and quantity supplied is known as the supply schedule. With the help of the supply schedule, a supply curve can be drawn. A supply curve is a graphical representation of the supply schedule.
 
There are two types of supply schedules and curves:
  • Individual supply schedule
  • ƒMarket supply schedule

Individual supply schedule

Individual supply schedule is a list of the prices and quantities of a given commodity offered for sale by an individual seller or producer. The following is an individual supply schedule. It shows that as the price goes up, an individual seller increases the quantity supplied in the market.
 

Price of X ()

Quantity of X (Units of good)

100

200

200

400

300

600

400

800

500

1000

 
The table shows the quantity of good X that would be supplied by an individual seller at different prices. At  100, 200 units of good X is offered for sale, and as the price rises, the quantity offered for sale increases.

Individual supply curve

With the help of the supply schedule given above, we can construct a supply curve of an individual seller.
 
Description: 19752.png
 
The supply curve slopes upwards from the left to the right i.e., it has a positive slope. Like the supply schedule, the supply curve also shows a direct relationship between price and quantity supplied.
 
In case of non-proportional relationship between price and quantity supplied, it would take the shape of a curve, as shown in the following graph.
 
Description: 19765.png




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