| Answer | Crossword Clue |
|---|---|
| XAXIS | Horizontal reference line on a graph |
| XAXIS | Horizontal line on a graph |
| AXIS | Reference line on a graph |
| AXIS | Line of reference on a graph |
| YAXIS | Vertical reference line on a graph |
| RANK | Horizontal line on a chessboard |
| MAGNETICEQUATOR | Line on which a dip needle is horizontal |
