2. Determine the linear function using linear regression. Show the step-by-step tabulated solution and the solution for each variable similar to the solution in the lecture notes. Fit the following data points using linear regression and determine the corelation coefficient r. Determine the function at x = 40. x 5 6 10 14 16 20 22 28 36 38 f(x) 30 28 22 21 16 14 12 8 4 0 3. Determine the quadratic function using quadratic regression. Show the step-by- step tabulated solution and the solution for each variable similar to the solution in the lecture notes. Fit the following data points using quadratic regression. Determine the function at x = 21. 2.5 3.5 5 6 7.5 10 X f(x) 7 12.5 15 17.5 20 5.5 3.9 3.6 3.1 2.8 2.6 2.4 2.3 2.1