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Math Help - graphing.

  1. #1
    Newbie annabananzaa's Avatar
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    graphing.

    im not sure on how i would go about finding points for these equations.

    the first one says to graph the equation by plotting points:
    x+3=7

    the second one just says to graph:
    y+x=-4

    the 3rd says graph linear eauation:
    x=y+2


    ANY kind of help is very much appreciated. thanks for reading!
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  2. #2
    Member
    Joined
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    Quote Originally Posted by annabananzaa View Post
    im not sure on how i would go about finding points for these equations.

    the first one says to graph the equation by plotting points:
    x+3=7

    the second one just says to graph:
    y+x=-4

    the 3rd says graph linear eauation:
    x=y+2


    ANY kind of help is very much appreciated. thanks for reading!
    1)
    x+3 = 7
    x = 4
    since there is no y in this equation it means it takes all the values.. so points can be (4,0) , (4,1) , (4,2) , (4,-1) (4,-2).. etc
    you'll get a vertical line.
    by the way, this is not a graph.


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

    if x = 0 then y will be -4 and you'll get a point (0-4)
    if x = 1 then y will be -5 and you'll get a point (1,-5)
    now you just draw a line through these two points.

    3)
    x = y+2
    y = x -2
    if x = 0, y = -2, point (0,-2)
    if x = 1, y = -1, point (1,-1)
    again, draw a line through both points
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  3. #3
    Newbie annabananzaa's Avatar
    Joined
    Jan 2009
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    thank you so much!
    i did it out when i was tyring to figure it out and i got the same answers!
    just wasnt sure if i was doing it right. thanks for helping me!
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