It is a ray.
A ray is a straight path of points that goes on forever in only one direction. A line would go on forever in two directions.
It is a straight line.
An idealised line.
line
A line is a straight path that goes on forever in both directions. A ray is a straight path that goes on in one direction.
Line.
A straight path that goes on forever on both directions
If you mean a straight path, rather than a strait path, then it is a ray.
It is called a line. LOL
a ray
it is called a ray
line