GCSE Maths (Edexcel)

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Line of Best Fit

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Statistics Statistics

Line of Best Fit

4:09 Using Scatter Diagrams
Spec S6
Previous Analysing Cumulative Frequency Graphs Next Outliers on Scatter Diagrams
  • Scatter diagrams are used to represent bivariate data
  • The line of best fit is a straight line that describes the correlation of the data
  • The line of best fit can show if there is a positive or negative correlation between the variables
  • The line of best fit should pass through the middle of the points and be as close to them as possible
  • Computers can determine the best possible best fit line, but at GCSE level, it is only expected to be drawn by eye
  • The line of best fit does not have to go through the origin
  • Stronger correlations make it easier to draw the line of best fit
  • A line of best fit cannot be drawn when there is no correlation between the variables

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