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Concept

Line

A line is a one-dimensional object of infinite length with no width or thickness that never bends or turns. Its graphical representation is a straight line with arrowheads on either end, indicating that it continues indefinitely in both directions.
Line l passing through points A (-1.5, 1.15) and B (1.5, -0.13).

Through any two different points there is exactly one line. A line can be named using any two points on it. The above line could be named or line When two or more points lie on the same line, they are said to be collinear.