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Line 1: A '''two-dimensional graph''' is a set of points in [[two-dimensional space]]. If the points are [[~~Real~~Function of a real variable\|real]] and if [[Cartesian coordinates]] are used, each axis depicts the potential values of a particular real variable. Often the variable on the horizontal axis is called ''x'' and the one on the vertical axis is called ''y'', in which case the horizontal and vertical axes are sometimes called the ''x'' axis and ''y'' axis respectively. With real variables on the axes, each point in the graph depicts the values of two real variables. Alternatively, each point in a graph may depict the value of a single [[complex variable]]. In this case, the horizontal axis is called the real axis and depicts the potential values of the real part of the complex number, while the vertical axis is called the [[imaginary number\|imaginary]] axis and depicts the potential values of the imaginary part of the complex number.

Two-dimensional graph: Difference between revisions