Bar graphs are used to show sets of data in more specific categories. 32 students were asked which season was their favourite. The table shows the results. Construct a bar chart that represents ...

Let’s talk about data. Just the facts. These data are information gathered by satellites, instruments on the ground (thermometers, wind speed gauges, etc.), lasers and the many other ways humans use ...

William Playfair, the father of data visualisation, changed the way we understand information. His bar graphs, pie charts, and line graphs remain essential tools today, yet his name is barely known.