Problem-Solving and Data AnalysisEasy–MediumEquation fitting a table of pairs
Problem-Solving and Data Analysis practice question
A table gives the pairs (0, 5), (1, 7), (2, 9), and (3, 11). Which equation fits all four pairs?
- A. y = 2x + 5Correct
- B. y = 5x + 2
- C. y = x + 5
- D. y = 2x + 3
Answer: A. y = 2x + 5
y rises by 2 for each step in x, starting from 5.
Why the other answers are wrong
- B. y = 5x + 2
- This gives 7 at x = 1 but 12 at x = 2.
- C. y = x + 5
- This gives 6 at x = 1.
- D. y = 2x + 3
- This gives 3 at x = 0.
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