public void CoefficientsTest()
        {
            QuadraticInterpolator target = new QuadraticInterpolator(standards());

            double[] actual;
            actual = target.Coefficients();
            Assert.AreEqual(3, actual.Length);
            Assert.AreEqual(8, actual[0]);
            Assert.AreEqual(-3, actual[1]);
            Assert.AreEqual(2, actual[2]);
        }