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Math Help - curve

  1. #1
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    curve

    How do you find the 'constant rate of change in a table'?
    x=1 Y=1
    =3 =2
    =5 =3
    =7 =4

    The answer is 1/2; but i have no clue as to how my teacher obtained that answer. If you can take some time to help, i would appreciate it greatly.
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  2. #2
    MHF Contributor
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    When thinking about the rate of change of a graph, it's normal to think of this rate as a fraction of (change in y)/(change in x). If the rate of change is constant, that means the slope of this graph is constant and you are talking about a line. Take the first two points (1,1) and (3,2). The rate of change between these points is (2-1)/(3-1) = 1/2. Try the other ones.
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