Although in common parlance a straight line is not curved, it is a curve in the mathematical sense (i.e., a mapping of an infinite set of points into a space). Mathematically, a line may be determined by the presence of any two points in an n-dimensional space (where n is two or more). A line segment is a piece of a line with definite endpoints.
In two dimensional Cartesian coordinates, the equation of a line has the form y = ax + b, where a and b are constants.
Related category GEOMETRY
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