You need to provide XValue and YValue for each point.
There are two approaches:
1. Build DataSeries, giving X & Y values for each DataPoint.
2. Create custom object that has two values, and use data binding (2 item mappings will be required, one for the X value and one for the Y).
There is no way to map N-dimensional arrays to the chart and support for such binding is not planned.
Please, review the following two help topics:
the Telerik team