This document provides an overview of the economic concept of supply. It defines supply as the quantity of a product that producers are willing and able to sell at various prices within a given time period. The document explains the law of supply, which states that higher prices lead to higher supply and lower prices lead to lower supply. It also introduces supply schedules, supply curves, and supply functions as ways to represent the relationship between price and quantity supplied. Key terms discussed include supply curve slope, quantity supplied, price, and the supply function formula of quantity supplied equals a negative x-intercept plus the slope times price.