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Math Help - graph the equation

  1. #1
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    graph the equation

    y+2x=2
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  2. #2
    Junior Member doomgaze's Avatar
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    Quote Originally Posted by jjjjj View Post
    y+2x=2
    Try solving so you have y=
    This function is a Y=mx+b where m is the slope and b is the Y intercept
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  3. #3
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    graph the equation

    doomgaze thanks, im having trouble on how the graph should look for

    y+2x=2
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  4. #4
    Junior Member doomgaze's Avatar
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    Quote Originally Posted by jjjjj View Post
    doomgaze thanks, im having trouble on how the graph should look for

    y+2x=2
    Like I said, the best way to start is to make it a lot easier on yourself and solve so that your function has y by itself. y=
    so y=2-2x or y=-2x+2 <-- this one is in perfect form of Y=mx+b


    Since b=2 you know it's going to intersect the y-axis at the point (0,2) and then you use the slope m=-2/1 so you move 2 on the y-axis and then 1 on the x-axis

    The graph looks like this:



    Most important, do you understand what I did?
    Last edited by doomgaze; April 2nd 2010 at 08:33 PM.
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  5. #5
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    Quote Originally Posted by jjjjj View Post
    y+2x=2
    You're meant to recognise ther equation of a line. Substitute x = 0 to get the y-intercept. Substitute y = 0 to get the x-intercept.
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  6. #6
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    The point is- that is a linear function so its graph is a straight line. Choose any two points on that line- the intercepts mr. fantastic chose are particularly easy- and draw the line through them.
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