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Estimating lines of best fit for predictions

Statistics • Statistics

Key concepts

What you'll likely be quizzed about

  • Lines of best fit, also known as trendlines, help identify the relationship between two variables in a scatter plot.
  • They demonstrate how one variable changes in relation to another.
  • By applying statistical methods, a line can be drawn to minimize the distance between the data points and the line itself.

Flashcards

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How is a line of best fit calculated?

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Using the method of least squares to minimize the distance from data points.

Key notes

Important points to keep in mind

Use the least squares method for accuracy.

A steeper slope indicates a stronger relationship.

Always check for outliers that may affect the fit.

The closer data points are to the line, the better the fit.

Real-world data may not always form a perfect line.

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