5th Grade Math - Coordinate Plane Lesson
A two-dimensional coordinate system is defined by a pair of intersecting horizontal and vertical number lines. These number lines are referred to as axes.
The point at which the axes intersect coincides with the 0 on each number line.
This point of intersection is referred to as the origin.
The location of a point on a coordinate grid is identified by an ordered pair.
The values of an ordered pair are referred to as coordinates.
The first coordinate indicates how far to move from the origin along the horizontal axis.
The second coordinate indicates how to far to move from the origin along the vertical axis.
For example, the origin is located at the point (0, 0).
Most commonly, a coordinate grid has the axes labeled as x (horizontal) and
The first coordinate of an xy-ordered pair is referred to as the x-coordinate.
The second coordinate is referred to as the y-coordinate.