Plot the logarithm of arrivals for each transportation mode against time, all on the same graph. Which now appears to be growing the fastest? Logarithms are especially useful for comparing series with...

Plot the logarithm of arrivals for each transportation mode against time, all on

the same graph. Which now appears to be growing the fastest?

Logarithms are especially useful for comparing series with two divergent scales

since 10 percent growth always looks the same, regardless of the starting level.

When absolute levels matter, the raw data are more appropriate, but when growth

rates are what’s important, log scales are better.