How many planes can be passed through two points?through three points in the straight line?

No plane passes through two points.  For three points to determine a plane, these points must be non-collinear, meaning the points are not lying on the same line. Therefore, if two or more points are on the same line (collinear), no plane is determined.  Three distinct points not lying on the same line (non-collinear) determine a plane. 


None because 2 points cant make a plane