The supply curve is a graphical diagram that shows the quantity supplied against the product's cost within a given period. The price appears on the left vertical side while the supplied quantity appears on the horizontal axis.

The supply curve considers several factors, including the product's price, the cost of its substitutes, tax regulations, technology, and seasonal conditions. All these factors determine the product's final price and the total rate of production of the product. The cost of its substitutes may cause a decline or incline in the production of the product. An increase in technology increases quality hence increasing the supply and price of the product. Tax regulations may either increase or decrease a particular product's cost if it's increased or decreased, respectively. In a particular product's season, the product's supply increases and price decreases while during the off-season, the supply decreases and price increases.

Supply can be defined as what can be issued in the market. In economics, the law of supply indicates that all other aspects held constant; price increase causes an increase in production and causes an increase in supply. Price is considered the main factor influencing the supply of products and services.