The point (0, 0) is called the:

origin — The point (0, 0) is the origin.

Chapter 9

Coordinates

Coordinates in the first quadrant — the origin, the axes, and distances between points — with an interactive exercise.

We work with coordinates in the first quadrant.

A point is (x, y) — across then up. The point (0, 0) is the origin. A point on the x-axis has y = 0. The distance between (2, 0) and (8, 0) along the axis is 8 − 2 = 6 units.

Remember

(0, 0) is the origin.
On the x-axis, y = 0; on the y-axis, x = 0.

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