Hi Andrew,
You’ve definitely uncovered a bug. Switching the legend attribute to categorical should produce the three lines. We’ll fix it!
Meanwhile, here’s another workaround that might work for your students:
- Drag Company Number all the way to the left in the case table so that you get a new table with just three rows.
- Edit the three numbers so they are no longer pure numbers. (In the screen shot you’ll see that I just added the letter ‘A’ after each.)
- Now, as shown in the screenshot, the desired three lines appear.
Hope this helps. And sorry for the trouble posting.
Bill
