Slope intercept form

9)

10)

11)  

12)

Step-by-step explanation:

Parallel lines have same slope and slopes of perpendicular lines are negative reciprocals of each other.

9) through (-3, 2), parallel to  

10) through (-5, -1), parallel to  

11) through (2, -5), perpendicular to  

12) through (-3, 5), perpendicular to  

∞ this is your sign

i believe it's a.

i'm not sure on this one, most likely correct.