Given, points are (−3,4,11) and (1,−2,7) Let A(−3,4,11) and B(1,−2,7) Direction ratios of AB=1−(−3),−2−4,7−11 =4,−6,−4 =−2,3,2 Now, we have one point (−3,4,11)=(x1,y1,z1) and direction ratios (a,b,c)=−2,3,2 ∵ Equation of line :