Double take: Oliver and James as the Weasley twins in the 2003 film Harry Potter And The Prisoner Of Azkaban surrounded by their co-stars. Identical: James, left, and Oliver Phelps arrive at London's Odeon Leicester Square for the world premiere of 'Harry Potter and the Chamber of Secrets' in 2002.
An increase in demand is represented by a shift of the demand curve to the right: A decrease in from ECON 101 at Universitat Pompeu Fabra
It represents demand from customers across a number of price points. In most cases, the demand curve takes the form of a downward sloping line, indicating that as price increases (from left to right, along the horizontal axis), the demand from customers decreases (moving down along the vertical axis).