XAXIS
| Date | Clue |
|---|---|
| 2014-06-07 | People plot things around it |
| 2014-01-31 | Bottom line? |
| 2013-06-28 | Representer of time, often |
| 2013-05-09 | Plot line |
| 2013-04-16 | Horizontal graph line |
| 2011-01-14 | Base line |
| 2007-04-01 | Horizontal line |
| 2006-12-14 | Line on which y = 0 |
| 1999-03-01 | Horizontal line on a graph |
| 1997-02-10 | The line y = 0, in math |