This document discusses demand analysis and the factors that influence demand. It defines demand as arising from the desire for a commodity combined with adequate purchasing power and willingness to pay the price. The law of demand states that the higher the price of a good, the lower the quantity demanded. A demand schedule shows the quantity demanded at different price points, while a demand curve graphs this relationship with price on the y-axis and quantity on the x-axis. Factors that can influence demand include the number of consumers, consumer incomes and tastes, availability of substitutes, expectations, and weather changes. Demand can be classified as price demand, relating to changes based on price, or income demand, relating to changes in consumer incomes.