The problems states: Find a unit vector with the same direction as the directed line segment from P(1,1,1) to Q(1,2,3) Just let me know if and where I go wrong or if I'm correct please. so, q-p= (1,2,3)-(1,1,1)=(0,1,2). I will call this new vector V? Taking the magnitude/norm of V I get: sqrt( (o)^2 + (1)^2 + (2)^2))= sqrt(5) Sorry I cant use the code to type this. Using the Unit Vector formula 1/||V|| * V 1/sqrt(5) * (0,1,2) = (0,1/sqrt(5), 2/sqrt(5) Is this correct?