What is a demand curve?

As noted above, the demand curve is a commonly used graph that represents the relationship between prices and the total quantity of goods and services demanded over a certain period of time. Prices normally appear on the y-axis while demand is depicted on the x-axis. This curve generally moves downward from the left to the right.

What is the difference between demand schedule and demand curve?

A demand schedule is a table that shows the quantity demanded at each price. A demand curve is a graph that shows the quantity demanded at each price. Sometimes the demand curve is also called a demand schedule because it is a graphical representation of the demand scheduls. Here's an example of a demand schedule from the market for gasoline.

What does movement along the demand curve mean?

Movement "along the demand curve" refers to how the quantity demanded changes when the price changes. Shift of the demand curve as a whole occurs when a factor other than price causes the price curve itself to translate along the x-axis; this may be associated with an advertising campaign or perceived change in the quality of the good.