Each row represents data points with a shared x-axis value.
|Column 1||Column 2||Column 3 (and beyond...)|
The x-axis value of the data point.
The y-axis value of the data point.
The y-axis value of a second data point (with the same x-axis as Column 1). This column adds an extra data set on the chart.
Go to Common Customization Options for settings.