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anonymous

  • 5 years ago

graph all solutions to the following 2x+3y=6

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  1. anonymous
    • 5 years ago
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    solve for y y = (6-2x)/3

  2. anonymous
    • 5 years ago
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    plug into graphing calc

  3. anonymous
    • 5 years ago
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    thanks but i dont have one

  4. anonymous
    • 5 years ago
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    try this: http://www.wolframalpha.com/

  5. anonymous
    • 5 years ago
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    i used matlab to plot this.

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  6. anonymous
    • 5 years ago
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    plug the equation i gave u in there and then just copy it down

  7. anonymous
    • 5 years ago
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    Or you could just... you know... plug in two points and use a ruler?!?

  8. anonymous
    • 5 years ago
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    thank you I give it a try I am just having a hard time understanding how to plot or knowing when to when i look at a problem

  9. anonymous
    • 5 years ago
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    Ok, well pick an x that's nice (say 0). Then plug it in and find out what y is.

  10. anonymous
    • 5 years ago
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    what do you get for y?

  11. anonymous
    • 5 years ago
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    I did not know should I replace x with a 0?

  12. anonymous
    • 5 years ago
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    y = 3

  13. anonymous
    • 5 years ago
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    y= 0,3

  14. anonymous
    • 5 years ago
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    (x,y) = (0,3). Then do the same thing for y (plug in a 0) and find a second point

  15. anonymous
    • 5 years ago
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    for (x,y) = (?,0)

  16. anonymous
    • 5 years ago
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    Kool thank you so my answer is x=0,3 and y= 3,0?

  17. anonymous
    • 5 years ago
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    no

  18. anonymous
    • 5 years ago
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    When you plug in a 0 for x you get y = 3 that's correct. That gives you the point (x,y) = (0,3). If you plug in a 0 for y you have this equation: \[0 = (6-2x)/3\]

  19. anonymous
    • 5 years ago
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    Which gives you \[x=3\] sorry, missread it. Ok, so now you have a second point (x,y) = (3,0)

  20. anonymous
    • 5 years ago
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    So you draw a Cartesian grid and draw those two points, then connect them with a straight line. That line represents all the x,y pairs that are solutions to the equation.

  21. anonymous
    • 5 years ago
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    You are so smart, that actually makes sense but what about y=5x-1 do i still use 0?

  22. anonymous
    • 5 years ago
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    would I go up 5 and down 1??

  23. anonymous
    • 5 years ago
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    If you are just being asked to graph it you can plug anything you want in for x or y (but not both!) then solve for the one you didn't plug in and you will have a point on the graph.

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