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Coordinate graphs
On a coordinate diagram the horizontal line is called the x-axis and the vertical line is called the y-axis. The point where the x-axis and y-axis meet is called the origin, O.

The coordinates of a point are written (a,b) where a is the distance across (left or right) and b is the distance up or down from the point (0,0).

The coordinate grid is divided into four sections called quadrants:

Graph (3,4) and tell wich quadrant is it in.

The point (3,4) is in Quadrant I