1. After some experimentation, you have observed the following data concerning the relationship between marketing and sales. Use Excel's curve fitting method to find the best quadratic equation to model this relationship. Marketing ($) 100 110 120 130 140 150 160 170 180 190 200 Sales ($100 310 500 600 690 780 850 925 1,000 1,050 1,090 1,120 A) -0.055x2 + 24x - 1516 B) 0.055x2 + 24x - 1516 C) -0.055x2 - 24x - 1516 D) -0.055x2 + 24x + 1516 E) -0.11x2 + 24x - 1516