A decrease in the price of a good is shown as a movement downward along the existing demand curve, from a higher price–lower quantity point to a lower price–higher quantity point.

Quick Scoop

  • On a standard demand graph, price is on the vertical axis and quantity demanded is on the horizontal axis.
  • The demand curve slopes downward from left to right, reflecting the law of demand: as price falls, quantity demanded rises.
  • When the price of the good decreases, you do not draw a new demand curve; instead, you slide along the same curve to a new point with lower price and higher quantity demanded.

Simple example story

Imagine a demand curve for movie tickets. At 15 dollars, people buy 100 tickets per day, and at 10 dollars, they buy 180 tickets per day. On the graph, both of these combinations lie on the same downward‑sloping demand curve, and the price cut from 15 to 10 is shown by moving down along that curve from the first point to the second, not by shifting the curve itself.

SEO meta description: Learn how a decrease in the price of a good is illustrated on a demand graph: it appears as a downward movement along the existing demand curve, from higher price–lower quantity to lower price–higher quantity.

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