Scatter graphs · Year 8
In Year 8 you learn: plotting scatter graphs.
A scatter graph plots pairs of measurements, such as temperature and drinks sold, as points. The pattern shows whether the two are related (correlated), and a line of best fit lets you estimate one value from the other.
Key facts
- Interpolation (inside the range of the data) is fairly reliable. Extrapolation (outside it) is not.
- An outlier is a point that does not fit the pattern.