good: your visual structure of choice is appropriate to the data you can compare all sites and varieties at once you found how to use an interactive control bars have 0 baseline the chart is almost properly annotated, except... bad: the missing annotation of Y axis: title and units i would use a nominal color palette for varieties, you have ordinal, but the varieties don't have any inherent order you can only see one year at once, which means when you want to compare data across years, switching back and forth overloads short term memory (remember it only has space for 5-7 items and you have 120). thus you have probably missed that only one of the sites gave better yield in 1932 across all varieties, while all other sites gave worse when switching between years, Y scale max value jumps between 60 and 70, thus further inhibiting the comparison between years //Angie Jon, Reed and Bob's instructor

Nice work on this! The grouped bar chart is a suitable visualization for this dataset, and adding the interaction to select a year allows one to see the YoY differences in values. It takes a little memorization to be able to see which went up and down year over year, but overall it does work. One suggestion is to add either a transition when the year is changed so you can more easily compare values across years. Another idea is to plot the YoY difference rather than each years value. You've successfully completed the course assignment. Expect a certificate to come into your inbox soon.