This trendline type is often used in sciences, for example to visualize a human population growth or decline in wildlife populations. The exponential trendline is a curved line that illustrates a rise or fall in data values at an increasing rate, therefore the line is usually more curved at one side.
And the R 2 value of 0.9855 indicates a pretty good fit of the estimated trendline values to the actual data.
For example, the following linear trendline shows a steady increase in sales over 6 months.
