Line graphs
A line graph is used to plot a set of data over an amount of time. This line graph plots the temperature of a hot drink over an hour. You can see how the drink temperature cools over time:
Always look carefully at the scale on each axis of the graph - each mark represents a different number.
To find the temperature of the drink after 20 minutes:
- Find the 20 minutes mark along the bottom axis of the graph.
- With a ruler or your finger, follow the line upwards until you reach the curved graph line.
- Now follow the line to the left until you reach the vertical axis.
- You can now read the temperature of the graph and find out that the drink was 40°C after 20 minutes.
