one point can form a line! horizontally or vertically... but a line doesn't need any points.
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10 collinear points form one set of overlapping line segments, of which there are 45.
None, because a line goes on forever. A line can only have points.
Two points.
A line, ray, or line segment contains an infinite number of points.
two points form a line one more point is needed to check whether it is collinear or not so atleast three points must be require to check the non collinerancy of a points