If the displacement of an object is proportional to square of time, then the object moves with

If the displacement of a particle is proportional to the square of time, then-

If the displacement of object moving in straight line proportional to square of time, then what will be constant ? Velocity of acceleration ?

The displacement of object is proportional to cube of the time, then acceleration is .....

The displacement of a particle starts from rest is proportional to the square of time, then the particle travels with

The displacement of a particle starts from rest is proportional to the square of time, then the particle travels with