When first looking at a graph of data, you should look for an overall pattern and any:

1. Reading a graph is a structured activity rather than a glance. 2. You want to look for an overall pattern and any outliers. 3. The pattern covers shape, centre and spread taken together. 4. Outliers are the individual points that fall well away from that pattern. 5. They matter because the mean is affected by outliers that do not influence the median. _Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 2 'Descriptive Statistics', sections 2.1-2.7_