- A plane containing a horizontal number line, the x-axis, and a vertical number line, the y-axis. The intersection of these axes is called the origin.
- a pair of numbers (x,y) that can be used to locate a point on a coordinate plane
- the 2 numbers that form the ordered pair are called coordinates
- the origin is identified by the ordered pair (0,0)
- there are 4 quadrants to a graph quadrant 1, quadrant 2, quadrant 3, and quadrant 4.
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