A bar chart is the best way to compare data using a consistent unit of measurement. You can include 1 to 8 data points, and you can also adjust the scale.
Here are some great uses of a bar chart:
*Monthly Active Users in Q1, Q2, Q3, Q4
*Visits to your blog or website in January, February, March
*Number of people surveyed who prefer chocolate, vanilla, or strawberry ice cream
*Average listing price for a neighborhood in 2014, 2013, 2012, and 2011
*The color palette changes along with the Theme -- experiment with different Themes for fresh looks.
*Keep labels short.
*It's helpful to call out your units in your chart title.
*You can always add more detail here in the Notes.