Almost any chart can be used.
A circle or pie graph (use a circle and a concentric annulus),
Clustered bar or columns,
A scatter plot with different symbols
A double line chart,
Areas,
etc
You might be thinking of the scattergram.
a double bar graph
A scatter plot displays two sets of data as ordered pairs. Each point on the graph represents an individual pair of values, typically corresponding to two different variables. This visual representation helps to identify relationships, trends, or correlations between the two sets of data.
The line and the bar graph is used to describe a graph that compares two sets of data.
The difference between a bar graph and a double bar graph is...... A bar graph displays one set of data, and a double bar graph compares two different sets of information/data.So should have a key.
bar graph
double line graph
The advantage is that you can compare multiple data sets in the same chart
You can compare two different data sets on the same chart.
You can compare two different data sets on the same chart.
line graph
a bar graph