i want know the process of 22-24

Problems 22-24 are based on the following information. The data displayed in the graphs below are the percent of the population living in rural areas and the average life expectancy from 217 countries in the world, collected a few years ago. Below the graphs is R output from a fitted linear model. All World Nations All World Nations 20 - 80 - Average life expectancy (years) 10 - 70- 60 - Residuals (years) -10 - 50- -20 - 25 50 75 O - 25 50 75 Percentage in rural areas Percentage in rural areas## Call : ## 1m(formula = LifeExpectancy Rural, data = AllCountries) ## Residuals : Min 10 Median 3Q Max # # -23. 418 -3. 100 1. 021 4. 389 21. 207 ## Coefficients: ## Estimate Std. Error t value Pr(> |t) ## (Intercept) 80. 55712 1. 06580 75. 58