Determine whether the pair of lines is parallel perpendicula
     Determine whether the pair of lines is parallel, perpendicular, or neither.  {-3/2 x + y = 4  4x + 6y = 2   
  
  Solution
given -3/2 x + y =4 => y = 3/2 x + 4 -----------(1)
4x+6y =2 => y = - 2/3 x + 1/3 -----------(2)
(1) has slope m1 = 3/2
(2) has slope m2=-2/3
m1 = - 1/m2
therefore they are perpendicular

