Please help with number 1,2,3 it will mean a lot !!

1.

A=-6,-2  Q 3

B=3,1    Q 1

C=-3,4    Q 2

D=5,-3   Q 4

E=0,-6    Q 4

F=-4,0   Q 2

G=0,2  Q 1

H=7,0  Q 1

2. See 2nd pic

3. (6,0)

Step-by-step explanation:

1. See the first pic

2. Second pic

3.

2a-4b=12              Try the first set of pairs

2(1)-4(-3)=12              (2*1)-(4*-3)=12

2-(-12)=12        2-(-12)=14 This is incorrect

Now the second pair

2(0)-4(-1)=12

0-(-4)=12       This is incorrect

Next...

2(6)-4(0)=12

12-0=12      Yay! Its correct!  

P.S I know the second pic is very blurry and I apologize, I couldn't show you how with a different graph