Data for Parabola Fit (Quadratic Fit) from Heath's Book
0.0  2.9
0.5  2.7
1.0  4.8
1.5  5.3
2.0  7.1
2.5  7.6
3.0  7.7
3.5  7.6
4.0  9.4
4.5  9.0
5.0  9.6
5.5 10.0
6.0 10.2
6.5  9.7
7.0  8.3
7.5  8.4
8.0  9.0
8.5  8.3
9.0  6.6
9.5  6.7
10.0 4.1