Question 5 To earn full credit for this question, use your own sheet of paper to solve the problem, showing all steps of your work. A regression was run to determine if there is a relationship between the happiness index (y) and life expectancy in years of a given country (x). The results of the regression were: y=a+bx a=-0.652 b=0.057 (a) Write the equation of the Least Squares Regression line of the form X