Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
A manager estimates that if the company charges 
dollars for their new product, where 
, then the revenue from the product will be 
dollars each week. According to this model, for which of the following values of 
would the company’s weekly revenue for the product be the greatest?
(A) 10
(B) 20
(C) 50
(D) 100
(E) 200
The Correct answer is D.
Explanation
The graph of 
is a downward-facing parabola that intersects the 
-axis at 
and at 
. Parabolas are symmetric, so the maximum value of 
occurs at 
, which is halfway between 
and 
. (When 
, the value of 
is 
.)