Parallel lines have equal slopes. Perpendicular lines have slopes that are opposite (e.g., negative) reciprocals of one another (so m1=-1/m2).Since these 2 lines are already in slope-intercept form, you can simply read off the slopes (the coefficient on the x variables). You have m1=2/9 and m2=-2/9. These are not equal, nor are they opposite reciprocals. So, these lines are NEITHER parallel or perpendicular.