What is a bubble plot?

A bubble plot is a graph that you can use to explore the relationships between three variables. Like a scatterplot, a bubble plot plots a y variable versus an x variable. However, the symbols (also called bubbles) on the bubble plot vary in size. The area of each bubble represents the value of a third variable.

This bubble plot shows the Combined MPG vs the Total Volume for automobiles at a dealership. The bubble size represents the retail price.

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