Warning: This site requires the use of scripts, which your browser does not currently allow. See how to enable scripts.

The same set of data shown on a logarithmic scale and a linear scale.

With exponential data, if you plot the data on a chart with normal axes, you'll see the typical exponential curve. However, if you use a logarithmic axis, then you'll see a straight line. But how do you change from one to the other?

It's a very simple process: You just need to select a check box in the **Format Axis** dialog box. You'll see exactly how to do this in the practice session.

Logarithmic scales are also useful if your data contains some very small numbers with a gap in the data, followed by a very large number. On a linear scale you would have a large gap in the middle of the chart; with a log scale, this is evened out.

**Note** The values on a logarithmic axis are only ever shown in powers of 10.