A typical bar chart would start a 0 for each person, but we want to chart both values. By starting each bar at the minimum point on the Y axis, you create what appears to be floating bars.

In a bar graph, however, the horizontal axis can take on a slightly different role. For example, if you are comparing the populations from three different years in a bar graph, the horizontal axis ...

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.

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.