def METHOD_NAME(x, y, return_coefs=False):
    """
    Evaluate :math:`y = f(x)` after approximating :math:`f` by an exponential.
    """
    coefs = approximate_exponential(x, y)
    if return_coefs:
        return coefs, eval_exponential(coefs, x)
    else:
        return eval_exponential(coefs, x)