Problem-Solving and Data AnalysisEasyPrediction from a line of best fit
Problem-Solving and Data Analysis practice question
A line of best fit for a scatterplot is y = 2x + 10. What value of y does the line predict when x = 5?
Answer: 20
y = 2(5) + 10 = 20.
Common wrong answers
- If you answered 12
- 12 is 2 + 10, forgetting to multiply by 5.
- If you answered 17
- 17 adds 2 + 5 + 10.
- If you answered 100
- 100 multiplies 2 × 5 × 10 instead of adding the 10.
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