The lines are NOT perpendicular because the slopes are not negative reciprocals.
Step-by-step explanation:
For two lines to be parallel, they must have the same slopes. For two lines to be perpendicular, they must be negative reciprocals.
In this case, the two slopes are simply reciprocals; they are not <em>negative</em> reciprocals. And so, the lines are NOT perpendicular because the slopes are not negative reciprocals.
