Question

What is the graph of the system y = –2x + 3 and 2x + 4y = –8? ( will be posting the graph choices in the comments in a minute)

Answer 1

10/3, -11/3

Answer 2

If we are to find the slope of both lines, we have:
2x+y=-3
y=-3-2x -> y=-2x-3 (Plug in values)

2x+4y=-8
4y = -2x-8
y = -1/2x - 2 (Plug in values)

If we plot these values, we have the following graph (See attached file)

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Answer 3

So to me, it looks like D is your answer.

Answer 4

i disagree

Answer 5

your second equation has a negative slope
both equations have negative slopes

Answer 6

I think C is the right answer. It's the only one with both slopes negative and a line that looks like it crosses y at 3.

Answer 7

number 1 has both slopes negative too

Answer 8

no a is right

Answer 9

y=-2x+3
y=-x/2-2 < hass y-intercept -2

Answer 10

Yeah, never mind. I forgot that the other also crosses at 3.

Answer 11

Actually myininaya, this was put in maple after solving by hand and using a solver, and the graph is idential to D. D has a y-intercept of -2.

Answer 12

d is wrong

Answer 13

Can you explain why? Because I can prove why I am right.

Answer 14

both equations have negative slopes

Answer 15

d shows the second line having a positive slope

Answer 16

How is -2x-3 a positive slope?

Answer 17

i said both equations have negative slopes

Answer 18

2x+4y=-8

x+2y=-4
2y=-x-4

y=-x/2-2

Answer 19

this is the equation it has y-intercept -2 and has negative slope

Answer 20

y=-2x+3 has y-intercept 3 and has negative slope

Answer 21

choice a fits this

Answer 22

I see...My bad on the sign of the first equation. Sorry bout that! :(
Had a couple people this morning jump down my throat over similar problems and I was correct. Going to log off for time being to reflect. Thanks for the good debate!!!
Choice A is correct. My y-intercept in this problem was wrong.

Answer 23

sean i think you read the question wrong actually

Answer 24

oops you noticed lol

Answer 25

I read the question right, but did the algebra wrong in my head. Reworked on paper and found a misplaced - sign.

Answer 26

thanks for the help everyone :)

Answer 27

Thanks for correcting me. I am far from perfect.

Answer 28

well no one is perfect