public void Matrix3x3Test()
        {
            PolynomialGraph_Accessor target = new PolynomialGraph_Accessor(); // TODO: Initialize to an appropriate value
            float[] x = { 1, 2, 3, 4 }; // TODO: Initialize to an appropriate value

            float[,] expected = new float[,]{
                {4,  10, 30},
                {10, 30, 100},
                {30, 100, 354},
            };

            float[,] actual = target.Matrix3x3(x);

            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Assert.AreEqual(expected[i, j], actual[i, j]);
                }
            }
        }