A point has no size, and a line is of infinite length, so it contains an infinite number of points. It takes only two points to describe or identify a line, but number of points it contains is infinte. Actually, even a line segment has an infinite number, since it is not possible to get two points so close together that another point won't fit between them.
Points that are contained on the same line or portion of a line are considered to be collinear.
A line has an infinite amount of points.
Infinitely many points are contained within a non-degenerate quadrilateral.
3 points must always be contained in one plane, as 2 make a line, it makes no difference as to where the third point is, it will exist in the same plane in the two. Aside from all three points being in a line, this is always true.
None, because a line goes on forever. A line can only have points.
A line segment has two end points.
A line is made up of an infinite number of points.
Points are collinear if they are on the same line.
any given line can have an infinite number of possible points.