Now compare those pie charts to these bar graphs. They show the same information, but the bar graphs let us see much more precisely both the changes and how big the different categories are.

Learn how to interpret and construct graphs in this guide for students aged 11 to 14 from BBC Bitesize.

They are popular because they are popular, which is a circular argument that suits a pie chart. But there are some serious downsides to using the humble pie.

When to use a bar chart Bar charts have two axes: categories (months of the year) on one and numeric value (the number of visitors to a national park) on the other.

See how UB’s visual vocabulary translates into compelling information graphics through pie, bar and line charts.

The avatars are silhouettes that leap around an environment of pie charts, bar graphs, angles and statistics, with each step and jump altering the immediate surroundings.

Types of graph In geography it is important to be able to read and understand data that is presented in a range of different ways. We often use graphs to present data in a clear and accessible way.