AlgebraEasyLine through three listed points
Algebra practice question
The points (1, 2), (2, 4), and (3, 6) all lie on the same line in the xy-plane. Which equation describes the line?
- A. y = 2xCorrect
- B. y = x + 1
- C. y = x + 3
- D. y = 2x + 1
Answer: A. y = 2x
Each y is twice its x.
Why the other answers are wrong
- B. y = x + 1
- x + 1 gives 2, 3, 4.
- C. y = x + 3
- x + 3 gives 4, 5, 6.
- D. y = 2x + 1
- 2x + 1 gives 3, 5, 7.
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