how to add a horizontal benchmark value line in a column chart?

[Guest]

I need to create a vertical column chart with a horizontal benchmark line to
show where the expected value is. Is this possible in Excel?

 

[Andy Pope]

Hi,

You will find examples of adding datum lines to charts here, including links
to other site examples.
http://www.andypope.info/charts/averageline.htm

Cheers
Andy