The electric field at point p due to a point charge q a distance r away from p has magnitude e. in order to double the magnitude of the field at p, you could the electric field at point p due to a point charge q a distance r away from p has magnitude e. in order to double the magnitude of the field at p, you could double the charge to 2q and at the same time reduce the distance to r/2. reduce the distance to r/4. double the charge to 2q. reduce the distance to r/2. double the distance to 2r.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.