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+bxa=-0.797b=0.181
(c) If a country increases its life expectancy, the happiness index will
(d) If the life expectancy is increased by 1 years in a certain country, how much will the happiness index change? Round to two decimal places.
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