Answer:
Perpendicular because the slope of the first one is 1. While the slope of the second one is - 1. On the other hand the slope of the third one is 1. So the 1 first one and the third one are parallel.
Step-by-step explanation:
Y=mx+b, m is slope
Y=x+5, 1 is slope
X+y=7
Y=7-x, - 1 is slope
3. Y=mx+b
-2=0+b, at point (0,-2)
b=-2
Y=mx-2
0=2m-2, at point (2,0)
2m=2
m=1, AKA the slope
