Problem-Solving and Data AnalysisEasy–MediumModel from a table of plant heights
Problem-Solving and Data Analysis practice question
A plant's height was recorded each week: 4 cm at week 0, 7 cm at week 1, 10 cm at week 2, and 13 cm at week 3. Which equation best models the height h, in centimetres, after w weeks?
- A. h = 4 + 3wCorrect
- B. h = 3 + 4w
- C. h = 4(3ʷ)
- D. h = 4 + 3w²
Answer: A. h = 4 + 3w
The height starts at 4 and rises by a constant 3 each week.
Why the other answers are wrong
- B. h = 3 + 4w
- This starts at 3 and rises by 4.
- C. h = 4(3ʷ)
- Exponential growth would triple the height each week.
- D. h = 4 + 3w²
- A squared term would make the weekly increases grow.
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