infinite
Only one if they are non-collinear. An infinite number if they are collinear.
I have a feeling that I'm wrong but i guess that 2 planes can pass through 2 points
Nonee !
Infinitely many planes.
There are an infinite number of planes that pass through a pair of points. Select any plane that passes through both the points and then rotate it along the line joining the two points.
three
three
Only one.
One.exactly one
Exactly one.
Through any three non-collinear points, exactly one plane can be defined. If the three points are collinear (lying on a single straight line), then an infinite number of planes can be created, as any plane containing that line will also pass through those points. Thus, the relationship between the points determines the number of planes possible.
just one