You are viewing a free preview of this lesson.
Subscribe to unlock all 10 lessons in this course and every other course on LearningBro.
Scatter graphs show the relationship between two variables. They are one of the most commonly tested statistics topics on all three Edexcel GCSE papers, with questions ranging from plotting points to interpreting lines of best fit.
| Term | Definition |
|---|---|
| Scatter graph (scatter diagram) | A graph plotting pairs of data as coordinates |
| Correlation | The relationship between two variables |
| Positive correlation | As one variable increases, the other increases |
| Negative correlation | As one variable increases, the other decreases |
| No correlation | No obvious relationship between the variables |
| Line of best fit | A straight line that best represents the trend of the data |
| Interpolation | Estimating a value within the range of the data |
| Extrapolation | Estimating a value outside the range of the data |
| Outlier | A point that does not fit the general pattern |
Positive correlation: Points go from bottom-left to top-right.
Subscribe to continue reading
Get full access to this lesson and all 10 lessons in this course.