PSAT Math Multiple-Choice Question 650: Answer and Explanation

Question: 650

What is the most logical explanation as to why the x- and y-axes begin as they do, as opposed to at zero values?

• A. The researcher is not interested in the relationship between weight and caloric intake for a subject less than 100 pounds who eats under 2,000 calories per day.
• B. No person weighs less than 100 pounds.
• C. No person eats under 2,000 calories in a day.
• D. A person cannot weigh zero pounds, and a person cannot consistently eat zero calories each day.

Correct Answer: D

Explanation:

(D) There's no need to start the y-axis at 0 pounds, because it's impossible to weigh 0 pounds. There's no reason to start the x-axis at 0 calories, because it's not possible to average 0 calories daily. This situation matches choice (D).