For example, the line graph below shows the Consumer Price Index again. However, this graph shows the change in price for three different categories: medical care (red), ...

To understand what a time graph is showing you, you need to look at three things: 1. Title - The title tells you what the graph is about. For example, "Temperature on the First of September." 2.

Learn about line graphs with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

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