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.
In mathematics, a tangent to a path refers to a line that touches the path at a single point without crossing through it. It represents the instantaneous direction of motion at that point on the path. Tangents are often used in calculus to calculate rates of change or slopes of curves at specific points. In physics, tangents to the path of a moving object can represent its velocity or acceleration at a given moment.
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.