Calculate the slope of each of the lines represented by your two equations. When an equation is in standard form, namely , then the slope is equal to the opposite of the coefficient on divided by the coefficient on , that is:
If the slopes of two lines are equal, then the lines are parallel. If the slopes are negative reciprocals, i.e. , then the lines are perpendicular. Otherwise, neither.
John
My calculator said it, I believe it, that settles it
