Hi,

If you don't want to list the average for each column and plot the
series as a line, which is by far the easiest way, you can do it using
an XY scatter and error bar.

Use the Source Data dialog to add a new series. Change the series chart
type to XY scatter markers only. Again using the source data dialog set
the Y value to the cell with the average. Leave the x value empty.
You should now have a single point, at the average value, in the middle
of the first column. Select the point and add X error bar with a fixed
plus value of the number of columns in your chart. Format error line as
required.

Cheers
Andy

Erika wrote:
I am trying to insert an average line in a chart. I have read some of the
posts and tried the suggested instructions and I am just not getting this to
work.

I have a column chart that has 11 locations and totals for each, I have
calculated an average - how do I insert an average bar without having to list
the average multiple times so it will go across each of the 11 locations.


--

Andy Pope, Microsoft MVP - Excel
http://www.andypope.info