Unit 3 - Objective 3 - Rectangular Coordinate Systems
A graph gives us a picture of an equation. By looking at a graph, we can get a better idea of what we can expect an equation to do. To get a graph in a plane, we need two lines. The point of intersection is called the origin. The horizontal line is called the x-axis and the vertical line the y-axis. This is called the rectangular coordinate system.
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