If the price of hairspray is represented by equation P = 10 - 0.2 QD, then the corresponding quantity of hairspray demanded is represented by the equation
A) QD = 5P - 2.
B) QD = 0.5P + 2.
C) QD = 50 - 5P.
D) QD = -10 + 0.2P.

Question

Quizplus · Accepted Answer

To find the quantity demanded (QD) equation, solve the given price equation P = 10 - 0.2QD for QD. Rearranging gives QD = (10 - P) / 0.2, which simplifies to QD = 50 - 5P.

If the Price of Hairspray Is Represented by Equation P