Its well past the new year so a littlebubbly is long overdue. Bubble charts are great in that they allow you to graph in 3 dimensions: Length, Height and Breadth (or area). Although the steps below are written with Excel in mind, they can also be applied to PowerPoint.
Watch this 3½ minute video to learn the basics regarding interpreting and creating bubble charts.
Creating a Bubble Chart
Input your data, placing the X-axis data in the first column, Y-axis data in the second column, and the area (bubble size) in the third column.
Select the data.
On the Insert tab, in the Chart group, Click XY and select from Bubble types. A Bubble chart is added to the worksheet
Note: If necessary click Switch Row/Column (on the Chart Tools:Design tab) to swap the series data.
Adding Data Labels
CLICK on one of the bubbles in the series. The entire series becomes selected.
RIGHT+CLICK one of the selected bubbles and select Add Data Labels. Data labels will appear.
To format label appearance and content, RIGHT+CLICK on a bubble and select Format Data Labels.
Formatting the Bubble Appearance (Fill)
CLICK on one of the bubbles in the series. The entire series becomes selected..
CLICK (again) on the bubble. The single bubble will be selected.
RIGHT+CLICK on the selected bubble and select Format Data Point. The Format Data Point dialog/pane appears.
Select Fill and set the fill options (e.g., color, pattern, fill, etc).