PSAT Math Multiple-Choice Question 744: Answer and Explanation

Question: 744

A marketing professional defines the point at which something goes "viral" as the point at which the item shifts from linear to exponential growth. During which week does the value of the new investment pledges become viral?

• A. 2
• B. 3
• C. 6
• D. 10

Correct Answer: C

Explanation:

(C) The slope of the function is steady and linear until around week 6, at which point it starts curving upward exponentially. An exponential function is one that goes up at a rapidly increasing rate or goes down at a rapidly decreasing rate, as opposed to a steady, linear rate.