def PolyCoefficients(xt, coeffs):
    """ Returns a polynomial for ``x`` values for the ``coeffs`` provided.

    The coefficients must be in ascending order (``x**0`` to ``x**o``).
    """
    o = len(coeffs)
    yt = 0
    for i in range(o):
        yt += coeffs[i] * xt ** i
    return yt