5.1 Drawing line graphs
Drawing a line graph is very similar to drawing a bar chart, and they have many of the same features.
Line graphs need:
- a title
- a label for the vertical axis (e.g. units of currency)
- a numbered scale on the vertical axis
- a label on the horizontal axis (e.g. month) so that it is clear to the reader what they are looking at.
The main difference when drawing a line graph rather than a bar chart, is that rather than a bar, you put a dot or a small cross to represent each piece of information. You then join each dot together with a line. There is significant debate over whether the dots should be joined with a curve or with straight line. Whilst the issue is (believe it or not!) hotly contested, the general consensus seems to be that dots should be joined with straight lines.
Activity 9: Drawing a line graph
Have a go at drawing a line graph to represent the data below.
The table below shows the temperatures in Tenby during the first two weeks of July 2018.
|Date||Temperature High ˚C||Temperature Low ˚C|
- A clothing store has outlets in Llandudno and Aberystwyth. Use the data in the table below to draw a line graph comparing monthly sales between January and June.