PSAT Math Multiple-Choice Question 484: Answer and Explanation
Question: 484
y = x2 + 8x + 23
What is the value of the y-intercept for the above equation when graphed in the xy-plane?
- A. –8
- B. 0
- C. 8
- D. 23
Correct Answer: D
Explanation:
D
The question asks for the value of the y-intercept. For any graph in the xy-plane, the y-intercept will occur when x = 0. Plug in x = 0 to get y = (0)2 + 8(0) + 23 and simplify to y = 23. The correct answer is (D).
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