Question

Are the lines 2y-x=6 and 6x-3y-33=0 parallel , perpendicular, or neither?

Answer 1

to see if the are parallel or perpendicular, you need to know the gradient of both lines.
the best way to do this is to get it into the form y=mx+b
where m is the gradient.

So rearrange both formulas to get y by itself

Answer 2

Okay , thank you.

Answer 3

if they are parallel, both m's should be equal,
if they are perpendicular m1*m2=-1
(m1 is the gradient of the 1st eqn and m2 is the second equation)