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There are two possible answers; if the line is crossing the plane at an angle, then the line and the plane only intersect at one point. However, if the line is part of the plane, then the entire line intersects with the plane, and there are an infinite number of intersecting points.
tangent
A line that does not lie within a plane and intersects the plane does so at one point.A line that lies within a plane intersects the plane at all points.
There are one or infinitely many points.
a line