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Determine whether or not the relation is a function. (-3,6), (-2,7, (-1,8), (0,9)

  • algebra -

    sketch a graph.

    one value of y for every value of x
    certainly a function

    In fact a straight line of form y = mx+b
    slope = 1 goes through those points
    y = x + b
    9 = 0 + b
    b = 9
    so a function that easily fits those points is
    y = x + 9

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