AlgebraEasyEquation from a table of pairs
Algebra practice question
The table shows three pairs of values that satisfy a linear equation. x | y 0 | 1 1 | 3 2 | 5 Which equation relates x and y?
- A. y = 2x + 1Correct
- B. y = x + 2
- C. y = 3x
- D. y = 2x − 1
Answer: A. y = 2x + 1
y starts at 1 and rises 2 for each step in x.
Why the other answers are wrong
- B. y = x + 2
- x + 2 gives 2, 3, 4.
- C. y = 3x
- 3x gives 0, 3, 6.
- D. y = 2x − 1
- 2x − 1 gives −1, 1, 3.
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