Anthony T. answered • 03/26/21

Patient Math & Science Tutor

Question 1: A is the correct answer.

If you list the price per cleaning vs. the # of customers, you get something like below

Price People

125 100

120 120

115 140

As price goes down, people go up. This would plot as a line with a negative slope which would be -4X where X is the price.

The # of people would be represented by Y = -4X + constant.

When Y = 100, X is 125, so the constant = 100 + 4 x 125 = 600, so Y = -4X + 600.

The revenue is X x Y = X(-4X + 600) = -4X^{2} +600X which is answer A.