Consider the demand for socks. What would cause a movement from one point on the demand curve to a point further down the curve? An increase in the price of socks. Increased demand for a kind of shoe typically worn without socks. Decreased demand for a kind of shoe typically worn without socks. A big sale on socks.

The demand curve is a graphical illustration of the relationship between quantity demanded and price. It is downward sloping, showing how quantity demanded changes at different price levels. The Y-axis shows price while X-axis indicates the quantity. Downward movement along a demand curve indicates an increase in the quantity demanded.

An increase in demand for socks can be caused by a reduction in price or an increase in demand for shoes that typically require to be worn with socks. A big sale on socks would also cause an increase in demand. A big sale would involve cash discounts and other deliberate actions that entice customers to buys socks. If many customers are convinced to buy, demand rises, resulting in a downward movement along the demand curve.