If the supply of pizza is affected by pizza s price the price of tomatoes and the price of cheese the. It can be either with respect to one producer individual supply function or to all the producers in the market market supply function. Using Demand Fuctions Lecture Notes Lecture 2 Additional Notes Studocu Supply function shows the functional relationship between quantity supplied for a particular commodity and the factors influencing it. Supply function . Supply function is the mathematical expression of law of supply. It s used in conjunction with what is called the demand function to determine equilibrium pricing for different markets. Some of the more important factors affecting supply are the good s own price the prices of related goods production costs technology the production function and expectations of sellers. It explains the relationship between the supply of a commodity and the factors determining its supply. The slope is defined as the change in price divide