The weight is the one that goes up there in the Y direction.

Make the squared distance between each point and the line in the Y direction as small as possible (minimizing squared vertical distances).

Another very popular criterion for line-fitting is minimizing squared deviations from the line in the Y direction (rule 4); this technique is known as linear regression.

One can start off by designating the vertical direction, usually labelled the Y direction.

Tilt quantifies the average slope in both the X and Y directions of a wavefront or phase profile across the pupil of an optical system.

Rapid optical tilts in both X and Y directions are termed jitter.

If x is in C then so is 1-x, and these points are linked by a semicircle in the positive Y direction.

These two points are linked by a semicircle in the negative Y direction.

The second part of the pulse sequence, PE, imparts a phase shift upon the slice-selected nuclear magnetization, varying with its location in the Y direction.

From this point, the secondary table can be offset in either the X or Y direction to set the cutter the desired distance from the workpiece's center.