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21 November, 12:30

Given that an arithmetic sequence can be expressed as a linear function in the form f (x) = mx+b, write a linear function to describe the sequence {10,15,20,25,30,35 ... }

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  1. 21 November, 13:53
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    For this case we have:

    m = (y2-y1) / (x2-x1)

    m = (15-10) / (2-1)

    m = 5/1

    m = 5

    Then,

    y-yo = m (x-xo)

    where,

    (xo, yo) = (1, 10)

    Substituting:

    y-10 = 5 (x-1)

    y = 5x - 5 + 10

    y = 5x + 5

    Answer:

    a linear function to describe the sequence is:

    y = 5x + 5
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