## magenxoxo 2 years ago Please helllppppp!? :D Which of the below systems of equations matches the following graph? x – 3y = 9 2x + 3y = 0 x + 3y = –9 2x + 3y = 0 x – 3y = –9 2x – 3y = 0 x + 3y = 9 2x – 3y = 0

1. precal

you sort of need the graphs?

2. magenxoxo

I know.. i have one

3. eclipse18

Can you post a picture of the graph then I can try to help?

4. magenxoxo

yes. one sec! :)

5. sampatho2

Just take some points on the graph and substitute them in the equation. Whatever equations satisfy the point are your equations

6. sampatho2

satisfy the point in the sense which give 0 on substitution of x and y co-ordinates in the place of x and y

7. magenxoxo

I don't know how to get the graph on here :/

8. magenxoxo

oh wait! its right there

9. sampatho2

they both intersect at (2,3) so if we substitute these equations in the above equations none satisfy so none of the equations match the graph

10. magenxoxo

hmm.... thats not one of the answers?

11. sampatho2

no

12. magenxoxo

Well, I'm confused then..

13. jim_thompson5910

The point of intersection is (3,2) not (2,3)

14. sampatho2

yeah sorry I'm wrong

15. sampatho2

in that case the last set is your answer try substituting 2 and 3 in the place of x and y

16. magenxoxo

So, would this be the answer? x – 3y = –9 2x – 3y = 0

17. sampatho2

no x+3y=9 (3+3*2=9) and 2x-3y=o (2*3-3*2=0)

18. magenxoxo

ahh. i was going to chose that one