- Three Values Per Data Points: Three values are required for each bubble. These values can be in rows or columns on the excel, but they must be in the following order: x value, y value, and then z value.
- Multiple Data Series: Plotting multiple data series in a bubble chart is similar to plotting multiple data series in a scatter chart. Scatter charts use sets of x values and y values, but bubble charts use sets of x values, y values, and z values.
