Find the normal vector and the plane passing through the lin
     Find the normal vector and the plane passing through the line x = 2t - 1, y = 2 + t, z = 2 and the point (1, 0, 1). 
  
  Solution
Setting t=0 and t=1 gives two points
P:(-1,2,2)
Q:(1,3,2)
And third point which is given is
R:(1,0,1)
Vector QP=(2,1,0)
Vector RP=(2,-2,-1)
Normal vector can be found by taking cross product of QP and RP
n=QP x RP=(-1,2,-6)
For a normal vector (a,b,c) and given point on plane: (x0,y0,z0)
The equation of plane is
a(x-x0)+b(y-y0)+c(z-z0)=0
SO equation of plane is
-(x-1)+2y-6(z-1)=0
-x+2y-6z=-7

