Team # 2

Bubble Chart-Team # 2

A bubble chart is a variation of a scatter chart in which the data points are replaced with bubbles, and an additional dimension of the data is represented in the size of the bubbles. Just like a scatter chart, a bubble chart does not use a category axis — both horizontal and vertical axes are value axes. In addition to the x values and y values that are plotted in a scatter chart, a bubble chart plots x values, y values, and z (size) values.

Bubble charts plot data defined in terms of three distinct numeric parameters. They allow the comparison of entities in terms of their relative positions with respect to each numeric axis and their size as well.

Column charts and line charts have 2 axes commonly – a numeric axis and a categorical axis. The Y-Axis is the numeric axis for column and line charts. This means that the quantitative magnitude of the plot is indicated by the position of the plot with respect to the Y-axis. Bubble charts are different, because both axes of a bubble chart are numeric. Hence, the position of the plot is an indicator of two numeric values.  The area of the plot is an indicator of the magnitude of the third numeric characteristic.