X (axis): draws x and y axes on a graph.

This representation makes it clear that the direct sum is a Cartesian product of the two sets corresponding to the x and y axes.

The residual degree of freedom amounts to the choice of orientation of the x and y axes on the plane.

Orientation along x and y axes is right on the money.

The plane is the only other surface with a three-parameter family of transformations (translations along the x and y axis and rotations around the origin).

Each of these points has a definite position on the x and y axes of the work plan.

Using rotated versions of this segment, one can measure distances along the x and y axes.

In each case, the x and y axes are the principal axes.

This structure can be thought of as an array, table, or grid with two dimensions which we will call the x and y axes.

These correspond visually with x and y axes in general geometry.