Answer:
Perpendicular
Step-by-step explanation:
Let's first get the slopes and see if we can go on from that.
(-7,-4 ) and (5,4) have a slope of : 2/3
(-4/6) and (6,-9) have a slope of : -3/2
This means that they are perpendicular because the slope of line #2 is the reverse and reciprocal of line #1 which follows the perpendicular rule.