DSquaredSlim

Look at a linear graph which shows sales data from years 1 to 10.

* If sales from year 1 to 2, went from $10 to $20, that's a 100% rise, or $10 rise.
* If sales in year 9 to 10 went from $1000 to $1010, a rise by $10, same as before, but that's only a 1% rise.
* A linear graph would show both changes as covering same distance on the graph, i.e., the jump from one year to the next measures the same on the graph.

But why so? The first one is a big change (100%), while the other is a smal change (1%). A loglinear graph takes care of that.