The Line Chart displays data of one or more series as lines:
The Line Chart expects data in a two (or more) column format such as:
Date
Revenue
Cost
23 January
38
24
24 January
39
24
25 January
40
24
26 January
40
24
In the Graph Designer you can then select the column you want to use for your x-axis:
Hence, the x-axis column does not need to be the first column. However, for consistency purposes it is recommended to always use your first column for the x-axis.
For each column, besides the one used by the X-axis one line will be displayed.