Three
Two intersecting lines can always cover three non-collinear points.
Any three non-collinear points will define a single plane. A plane is composed of an infinite number of distinct lines.
None. In ordinary geometry, a line contains an infinite number of points and, by definition, they are all collinear. In projective geometry, however, you can have three lines in the form of a triangle. Each line has only two points on it, so it cannot have 3 points collinear.
7.
Three
Two intersecting lines can always cover three non-collinear points.
3
Any three non-collinear points will define a single plane. A plane is composed of an infinite number of distinct lines.
One.
None. In ordinary geometry, a line contains an infinite number of points and, by definition, they are all collinear. In projective geometry, however, you can have three lines in the form of a triangle. Each line has only two points on it, so it cannot have 3 points collinear.
7.
only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
As long as at least two of them are different points, exactly one line.
There are 91 lines.
15 lines.
3