Question

Choose the correct graph of the given system of equations. (posted below)

y + 2x = −1
3y − x = 4

Answer 1

1.

Answer 2

2

Answer 3

3

Answer 4

whoa stop!

Answer 5

or none above

Answer 6

lol

Answer 7

i think its either no solution or none above

Answer 8

there is one solution
if you just need the graph, you have to graph both lines. i would do this
http://www.wolframalpha.com/input/?i=y+%2B+2x+%3D+%E2%88%921%2C3y+%E2%88%92+x+%3D+4+

Answer 9

the lines are not parallel, the slopes are different. you can solve by writing \(x=3y-4\) form the second equation, the replacing \(x\) by \(3y-4\) in the first to get
\[y+2(3y-4)=-1\] and solving for \(y\)