If it is perpendicular then the slope of it will be:

y = 1/3 x + b
-1 = (1/3)(3) + b
-1 = 1 + b
b = -2
The equation is:
Answer:
wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
Step-by-step explanation:
sorry
Answers:
121/11=11
23/3=23/3
85/5=17
7-4=3
........................