Not that anyone ever wants mathbitch to answer the questions because apparently I know nothing
The magnitude of a vector is simply the square root of the change in x and y both squared.
The direction is the inverse tan ( change in y/change in x).
magnitude = √ (x2-x1)2+(y2-y1)2
direction
tanθ = (y2-y1)/(x2-x1)
θ = tan-1(y/x)