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Line of best fit — Edexcel GCSE Statistics Definition | GradeGen

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Statistics
Key terms
Line of best fit

GCSE Statistics · key term

Line of best fit

Definition

A straight line drawn through a scatter diagram to summarise an approximately linear relationship between two variables and make estimates.

Used by Edexcel

How each exam board covers it

Edexcel GCSE Statistics · 1ST0

Specification 2e.04 · Paper 1, Paper 2

If the points follow an approximately straight upward or downward pattern, a line of best fit summarises that relationship. It can then be used to estimate one variable from the other.
Revise: Lines of best fit

Edexcel Statistics past papers

Related key terms

Double mean point
Extrapolation
Gradient
Interpolation
Regression line

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