The rectangular graph also called the cartesian coordinate system is based on a two-dimensional plane consisting of the x-axis and the y-axis.
It should be noted that a cartesian coordinate system in two dimensions is defined by an ordered pair of perpendicular lines, a single unit of length for both axes, as well ad an orientation for each axis.
The Cartesian coordinate system uses a horizontal axis that is called the x-axis and a vertical axis called the y-axis. It should be noted that equations for lines in this system will have both the x and y variable.
For example, the equation 2x + y = 2 is an example of a line in this system
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