16Hit1600
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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