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

The most useful selection is a bar chart, because it allows you to format the second series as a line. Superimposing two types of charts makes identifying the two data scales easier.

A line chart connects a series of data points and is used by traders to monitor prices, currencies, indexes, and other data.

These chart types allow number and word variables, where Line charts, Scatter charts, and Area charts require two numeric variables. Customize the chart by clicking the "Design," "Layout" and ...

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 show average temperature and total rainfall.