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math [linear equations]

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graph the following equation

x-y=5

  • math [linear equations] -

    If you can plot points, remember that two points determine a line. So, pick two easy points and plot them. Then draw a line through them.

    So, what's easy? How about letting x=0 or y=0? That gives us

    0-y=5
    y = -5

    x-0=5
    x=5

    So, our two points are
    (0,-5) and (5,0)

    Now it should be clear. You can always pick other points if you want, but they won't really give you any more information.

    If you want x=3, then 3-y=5 and y = -2 so the point (3,-2) is on the line too.

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