college algebra

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given the function fx=x^3+x
a) find the rate of change between the two stated values for x: 1 to 2
B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)

  • college algebra -

    f(x) = x^3+x
    f(1) = 2
    f(2) = 10
    slope is thus 8

    The line is thus

    y-2 = 8(x-1)

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