Let the given points be P(x1,y1,z1)=P(6,−7,−1) and Q(x2,y2,z2)=Q(2,−3,1). Using the formula for direction ratios are given by: <x1−x2,y1−y2,z1−z2>=<(6−2),(−7−(−3)),(−1−1)>=<4,−4,−2> Since these are the direction ratios we can write the above ratios as <−4,4,2>