The x-coordinate is the first value in an ordered pair $(x, y)$ representing a point's horizontal position on the Cartesian plane. It indicates how far left or right the point is from the origin (0, 0).
5 Must Know Facts For Your Next Test
The x-coordinate is always written first in an ordered pair.
A positive x-coordinate indicates a position to the right of the origin.
A negative x-coordinate indicates a position to the left of the origin.
The x-axis is horizontal and intersects with the y-axis at the origin.
In equations of vertical lines, all points share the same x-coordinate.