Algebra

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Determine the quadratic function of f whose vertex is (2,-1) and passes through (3,1)
f(x)=

  • Algebra -

    from the vertex, we know that

    y = a(x-2)^2 - 1
    since y(3) = 1,
    1 = a(3-2)^2-1
    1 = a-1
    a = 2

    y = 2(x-2)^2 - 1

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