AlgebraHardPoint not on a line
Algebra practice question
Line L in the xy-plane has a slope of 4 and a y-intercept of 6. Which of the following points is NOT on line L?
- A. (2, 12)Correct
- B. (0, 6)
- C. (1, 10)
- D. (−1, 2)
Answer: A. (2, 12)
L is y = 4x + 6. At x = 2, y = 14, not 12, so (2, 12) is not on the line.
Why the other answers are wrong
- B. (0, 6)
- (0, 6) is the y-intercept itself.
- C. (1, 10)
- 4(1) + 6 = 10, so (1, 10) is on the line.
- D. (−1, 2)
- 4(−1) + 6 = 2, so (−1, 2) is on the line.
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