PSAT Math Multiple-Choice Question 802: Answer and Explanation

Question: 802

A function never intersects the y-axis. Which of the following could be an equation of the function?

• A. y = 2x - 5
• B. y = 4
• C. x = 36
• D. y = x

Correct Answer: C

Explanation:

(C) x = 36 does not have a y-intercept since it runs parallel to the y-axis. Therefore, this equation never intersects the y-axis. Here is a graph of x = 36:

All of the other choices intersect the y-axis one time since they have a y-value when x = 0.