How is constant velocity indicated on a motion map? by vectors that slowly increase in length by vectors that are all the same length by dots that slowly increase in size by dots that are all the same length

by vectors that are all the same length

Explanation:

In motion map we have to draw the vectors in which the length of the vectors will represent the magnitude of the velocity.

Now we know that if velocity is to be constant in the representation then the magnitude must remains the same and in this case the motion map will be a figure in which all the vectors are of same magnitude and they must be in same direction.

So here correct answer must be

by vectors that are all the same length