a line
a ray
a road......?
resultant displacement
Most likely sinusoid.
A line.
it is called a ray
The shortest path between two points is called a geodesic. In flat (Euclidean) space it is simply a straight line.
Line
Straight means starting from one point and goes in same path and join at end point
A line.
If you mean a straight path, rather than a strait path, then it is a ray.
ray
A line is a straight path that extends infinitely or endlessly in opposite directions. A straight path that joins two points is called a line segment.
Ray
"Directly" means immediately or without anything in between. It can refer to something happening without delay or interference, or to something being in a straight line or straight path from one point to another.
The straight path that light travels is called a ray. It represents the direction of light propagation in a particular medium or space.