Statistical diagrams
A combination of statistical information can be presented in diagrams. This involves constructing, interpreting and comparing pie charts and cumulative frequency diagrams.
Scatter Graphs
For more information on scatter graphs see Bitesize National 4 Lifeskills Maths Statistics.
A scatter graph is used to investigate whether or not two variables are related.
In each of the two cases above the scatter graph shows a relationship or correlation.
In the first case it's a positive correlation.
In in the second case it's a negative correlation.