Question

I have 3 math questions please help 30 points c:

Answer 1

1)
2x+y=-2
(2,y)  then: x=2
Therefore:
2(2)+y=-2
4+y=-2
y=-2-4
y=-6

answer: A.  -6

2)
answer: C. there is not relationship between the variables

3)
Answer: C.t