# Demand

Demand depicts the quantity of products the consumer purchases for different prices.

## Example

The demand for cookies follows the equation: Q_d = 10 - P.

If price is $3, the quantity demanded is Q_d = 10 - 3 = 7 cookies. ### Question The demand for cookies follows the equation: Q_d = 227 - 24 \times P. If cookies were sold on the market for$9, what is the quantity demanded?

Plug the price \$9 into the demand function: $$Q_d = 227 - 24 \times P = 227 - 24 \times 9 = 11$$