This document provides an overview of supply, including the definition of supply, the law of supply, differences between supply and quantity supplied, supply schedules, supply curves, factors that can cause supply curves to shift, and elasticity of supply. The key points are: - Supply is the willingness and ability of sellers to produce and offer goods for sale. The law of supply states that quantity supplied increases as price increases and decreases as price decreases. - A supply schedule shows quantity supplied at different price levels while a supply curve graphs this relationship. Supply curves typically slope upward but some are vertical. - Factors like resource prices, technology, taxes, subsidies, quotas, number of sellers, and weather can cause supply