Where bar and column charts show individual values for each series, histograms group data together to show frequency distributions. In this example, we have 20 students and their exam marks.

Choosing the right graph is very important. Bar charts and line graphs can be combined. Climate graphs are an example of this. The x-axis shows the months of the year and there are two y-axes to ...

Choosing the right graph is very important. A line graph could be used to show the changes in a country's employment structure over time. This graph shows that in the post-industrial era ...