Some direction on this:
1 - get both equations into the form y = mx + b (the first one is already there)
2 - Then look at the slope (m):
(a) If the slopes are equal, the lines are parallel
(b) if the slope of one is the negative reciprocal of the other, the lines are perpendicular
Example: the slope of the first equation is -2/3 . For the second equation to be perpendicular to the first, the slope of the second equation would need to be 3/2.
(c) If the slopes are not the same, and one is not the negative reciprocal of the other, then the lines intersect and are neither parallel or perpendicular.