Destinyyyy
  • Destinyyyy
Graph..
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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Destinyyyy
  • Destinyyyy
2x+y=-8 4x+2y=-16
Destinyyyy
  • Destinyyyy
y=-2x/1 -8 y=-2x/1 -8
UsukiDoll
  • UsukiDoll
Is it just graphing 2x+y=8 4x+2y=-16 ? did you put it in y=mx+b form first?

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Destinyyyy
  • Destinyyyy
Yes I did.. My graph only goes to 6
anonymous
  • anonymous
Does you graph only goes to \(6\) in one axis or both axes? Just plug in \(x\) values that are small, but still large enough that you can graph the lines.
Destinyyyy
  • Destinyyyy
Yes it only goes to 6.. Huh?
Destinyyyy
  • Destinyyyy
I got the same line for both equations..
anonymous
  • anonymous
Then just graph a /single/ line? When two lines overlay each other in a system of equations, it means there are infinite solutions.
UsukiDoll
  • UsukiDoll
original 2x+y=-8 4x+2y=-16 y=mx+b form y=2x-8 y=-2x-8
Destinyyyy
  • Destinyyyy
Yes I know that.. But it was only giving me options of x= a number and y= a number
UsukiDoll
  • UsukiDoll
for some reason I got the lines to be perpendicular when I graphed y=2x-8 and y=-2x-8
UsukiDoll
  • UsukiDoll
maybe we have to solve for x and y using the graphing method
Destinyyyy
  • Destinyyyy
You missed the negative on 2
Destinyyyy
  • Destinyyyy
Okay.. How do I do that?
UsukiDoll
  • UsukiDoll
no I didn't. 2x+y=-8 4x+2y=-16 is your original equation so I put it in y=mx+b form for the first equation 2x+y=-8 y=-2x-8 for the second equation I need y to be just y... no digits next to it so I divided the whole thing by 2 4x+2y=-16 2y=-4x-16 so dividing the whole equation by 2 y = -2x-8
UsukiDoll
  • UsukiDoll
so we can either graph y=-2x-8 and y=-2x-8 by letting x be any number, use elimination method, or find the y intercept which is set x = 0 for y = -2x-8 and y=-2x-8 oh darn I did miss that negative the first time lol
UsukiDoll
  • UsukiDoll
<---- hasn't slept well in 3 days... mistakes are magic XD
UsukiDoll
  • UsukiDoll
ok... graphing y = -2x-8 and y =-2x-8 gave me a single line.
UsukiDoll
  • UsukiDoll
maybe we just need to find intercepts after this... ? y = -2x-8 and y=-2x-8 for x -intercept let y = 0 for y-intercept let x = 0
Destinyyyy
  • Destinyyyy
Im leaving to take my final in less then 20 minutes.. last night I guessed on this problem
UsukiDoll
  • UsukiDoll
hmm... what was the question? could you give me the details?
UsukiDoll
  • UsukiDoll
was it just graph or find intercepts or solve for x and y ?
Destinyyyy
  • Destinyyyy
It was graph
UsukiDoll
  • UsukiDoll
ok then change the equations into y=mx+b form and graph letting x be any number you choose and solve for y so take y=-2x-8 for example if I let x = 1 then y = -2(1)-8=-1-8=-10 so the point is (1,-10)
Destinyyyy
  • Destinyyyy
Thats it???
UsukiDoll
  • UsukiDoll
yeah if it just said to graph, and that's how you find points manually
Destinyyyy
  • Destinyyyy
Okay.. Hopefully I remember that
Destinyyyy
  • Destinyyyy
Thank you for your help.
UsukiDoll
  • UsukiDoll
you're welcome :)

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