Price and Demand P Q Demand Input: Price = 100 Output: Quantity = 100 Adjust price by moving the slider. Note that as the input (price) changes. the quantity sold also changes. At high prices a low quantity is sold. At low prices a high quantity is sold. Note that as the input (price) moves, the quantity sold changes. At high prices a low quantity is sold. At low prices a high low quantity is sold.