Answer:
Non accelerated straight line motion.
Step-by-step explanation:
Four key components of describing motion:
- Displacement
 - Velocity 
 - Acceleration
 - Time 
 
We can see from the graph that , 
The displacement 
 vs time 
 is a straight line. 
Let's assume that the y-intercept is 
 . Thus , the equation of the line will be , 
 ----1
Where 
 is a constant or the slope of the line . 
The equation of motions for a rectilinear straight line motions are : 

By comparing the first equation of motion with equation 1 , 
we see that the coefficient of 
 term must be zero. Thus ,
 
Thus , from the other equations of motion , 

∴
∝