case 1)
x values and two values in three columns side by side: Select all three
columns of data and make chart

case 2)
x values and one y-value are in neighbouring columns but second y-range is
elsewhe Select x and first y; hold CTRL; select second y; make chart

case 3)
two sets of x and y values: make chart from first set; select second set and
Copy; activate chart; use Edit | Paste Special | New Series (check the box
for x-values in first column)

Hope this covers it. Please use the white space to ask questions in detail
best wishes
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
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