| Answer | Crossword Clue |
|---|---|
| ORIGIN | Intersection of the x and y axes |
| ORIGIN | Crossing point of the x and y axes |
| ORIGIN | Where the x and y axes meet |
| GRAPH | Something with x and y axes |
| argand | a system of rectangular coordinates in which the complex number x + iy is represented by the point whose coordinates are x and y |
| zaxes | (in a three-dimensional Cartesian coordinate system) the axis along which values of z are measured and at which both x and y equal zero |
| quaternion | A complex number of the form w + xi + yj + zk, where w, x, y, z are real numbers and i, j, k are imaginary units that satisfy certain conditions |
