Hi,
A bubble chart can take one X value and two Y values. The first value represents the center of the bubble with respect to y axis and the second y value specifies the size (diameter) of the bubble. The following code illustrates this:
series.Points.Add (0, 1, 7);
series.Points.Add (1, 3, 5);
series.Points.Add (2, 4, 9);
Note: While plotting, the size of each bubble is calculated in proportion with the other values.
You can refer to the online documentation which explains the same in the following link :
http://www.syncfusion.com/library/
Please let me know if this helps you. We will be glad to assist you if you have any additional questions.
Thanks and Regards,
Geetha