Excel defaults to a linear scale for graphs, but you can easily change it to logarithmic to suit wide data ranges or logarithmic phenomena. The Chart Wizard produces graphs with linear scales.

I help people communicate data clearly with graphs. There are two main reasons to use logarithmic scales in charts and graphs. The first is to respond to skewness towards large values; i.e., cases ...

I help people communicate data clearly with graphs. In “When Should I Use Logarithmic Scales in My Charts and Graphs”, I showed the revenues of the top 60 Forbes 500 companies using both ...