In the market for good X there are three buyers, Adam, Bill, and Carolyn. Adam buys 3 units of good X at $4, Bill buys 7 units of good X at $4, and Carolyn buys 8 units of good X at $4. One point on the market demand curve for good X consists of a price of and a quantity demanded of units.

One point on the market demand curve for good X consists of a price of $4 and a quantity demanded of 18 units.

Explanation:

Quantity demanded is a term utilized in Economics to portray the aggregate sum of a decent or administration that buyers request over a given interim of time. It relies upon the cost of a decent or administration in a commercial center, whether or not excessively showcase is in harmony.

The quantity demanded (qD) is a component of five variables: price, pay of the purchaser, the cost of related products, the flavors of the customer, and any desire the buyer has of future stock, costs, and so forth. As these elements change, so too does the amount requested.

answer; encouraging the development of innovations by firms attempting to break a monopoly; (creative destruction)