CiRcLe GrApH!
the x-axies
A cluster in a line graph is the major part of the line graph that connects to the plot.
If they things you are comparing part of a whole, pie graph. If not, bar graph.
It is the legend or key.
It is somewhat subjective what the most important part of a graph is. It is very important that you label each axis.
Then that part of the graph is below the x-axis.
A pie graph
A circle graph
Each segment of the circle graph represent a part of the whole.
The graph could go on forever while a data table only shows a part of the graph.
by making the graph have an important missing part...(hope it helps!)