6. Use the data below to answer the questions that follow. a) Do a polynomial regression of Degree 2. Record both the Coefficient of Correlation and the regression equation, with all parameters rounded to 3 decimal places. b) Do a polynomial regression of Degree 4. Record both the Coefficient of Correlation and the regression equation, with all parameters rounded to 3 decimal places. c) Which of the two above regressions is the best fit for the data, and why? x -4 -2.5 0 1 2.5 3 3.5 y 99.56 30.87 -3.52 -5.25 132.93 256.62 441.04