tell whether the lines are parallel,perpendicular or neither 

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what lines?

find the slope by putting it  in y=mx+b form where m= slope so -6y=-3x-12 or y=1/2x+2 so slope for first one is 1/2 and then the equation of the second one is 9y=-18x-12 or y=-2x -4/3 so slope is -2. if slopes are equal then it is parallel if slopes are neg, recip. then it is perp. so lines are perpendicular

Use this simple rule: Parallel lines have the same slopes and different y-intercepts.Perpendicular lines are a little tricky; if a line is perpendicular to another, the slope of the line is the negative reciprocal of the line it is perpendicular to.Ex: y = 3x is perpendicular to y = -1/3x