Figure 9: Linear polynomial of degree 6: Line of best fit y = -1.783e + 04 x6 + 5.193e + 05 x5 - 6.005e + 06 x4 + 3.489e + 07 x3 - 1.056e + 08 x2 + 1.526e + 08 x - 7.638e + 07