Bubble Chart

A bubble chart is a scatterplot that shows relationships between three or four variables. The position of the bubble shows the relationship between the x and y variables.

• The bubble size is based upon a numerical variable, such as population, or sales.

• The bubble color is best reserved for categorical data, such as region.

• Bubble charts are best when the bubble sizes vary significantly.

Sosulski, Kristen. Data Visualization Made Simple (p. 51). Taylor and Francis. Kindle Edition.

Bubble Chart

Symbol maps are point maps that use different sized bubbles or shapes to mark a location. These symbols are sized by a certain variable. Too many or too large bubbles can obscure the locations referenced.

Sosulski, Kristen. Data Visualization Made Simple (p. 53). Taylor and Francis. Kindle Edition.