Let the Study Guides explain Correlation and Line of Best Fit. See below ...

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Resources used with students studying Maths in Scottish Secondary Schools

Understanding Scatter Graphs is important to ensure your success in tests, assessments and exams.

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Exam Ques 1 (GCSE) | Scatter Graphs |

Exam Ques 2 (N5) | Scatter Graphs |

Exam Ques 3 (N5) | Straight Lines (Scatter Graphs) |

Exam Ques 4 (N5) | Straight Lines (Scatter Graphs) |

PowerPoint | Straight Lines |

Video | Video |

An exam question on Scatter Graphs is shown below:

*Teams in a quiz answer questions on film and sport. This scatter graph shows the scores of some of the teams. **A line of best fit is drawn as shown.*

* **(a) Find the equation of this straight line. *

* (b) Use this equation to estimate the sports score for a team with a film score of 8*

Source: N5 Specimen Paper, 2013, P1, Q6.

Scatter Graphs are a type of mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data.

In exams you may be asked to:

*Describe the correlation**Draw the line of best fit**Find the equation of the line**Use the equation, or graph, to predict a value*

We cover everything you need to know about Scatter Graphs in the Study Guides.

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