Q Lumen OHM ) CC) recording_35 ) CC] - recording 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: =a+bx a=-1.648 b=0.067 (a) Write the equation of the Least Squares Regression line of the form (b) Which is a possible value for the correlation coefficient, r? 1.657 -1 .657 0.601 ' -0.601 (c) if a country increases its life expectancy. the happiness index will decrease increase (d) ifthe life expectancy is increased by 2.5 years in a certain country, how much will the happiness index change? Round to two decimal places. years. Round to two decimal places