only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
Two intersecting lines can always cover three non-collinear points.
7.
There are 91 lines.
only one line
only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
Two intersecting lines can always cover three non-collinear points.
There are 91 lines.
Infinitely many planes may contain the same three collinear points if the planes all intersect at the same line.
only one line
Any three non-collinear points will define a single plane. A plane is composed of an infinite number of distinct lines.
3
Three
Exactly one.
3 lines and one plane
There are 13*12/2 = 78 lines.
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