The fact is that if you have one straight line, there are an infinite number of planes in which it lies. One can see this by simply rotating the plane around the line. Thus, "a line lies in at least one plane" is a true statement.
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If you have one straight line, there are an infinite number of planes in which it lies.
A point - unless the line lies within the plane, or is parallel to it.
Two lines that coincide look and act exactly like a single line. If you have one straight line, there are an infinite number of planes in which it lies.
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.
You first look at each axes