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The coordinate plane is a two-dimensional surface for the purpose of plotting lines, points, and even curves.

- On a coordinate plane the x-axis is the horizontal scale, and the y-axis is the vertical scale.

- The point where the x and y axis cross is called the origin.

- The y-axis, and x-axis are used to locate points on a coordinate plane.

- A point is named by two numbers called an ordered pair.