Line-Graph
Select one or more Y columns or a range of data from at least one Y column. If there is an associated X column, X column supplies X values; otherwise, sampling interval of the Y column or row number is used.
Select required data.
From the menu, select Plot > Basic 2D: Line.
or
Click the Line button on the 2D Graphs toolbar.
LINE.OTP (installed to the Origin program folder).