You need to chart the data in an XY Scatter chart (not a Line chart). You can choose
an XY Scatter chart subtype that connects the markers with lines. Then double click
each axis, and on the Scale tab, check the Logarithmic Scale checkbox.

- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
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