Here is a random sample of 12 different years from 1970 to 2017 comparing the average life expectancy y (in years) for babies born in a given year and the number of registered vehicles x in the US (in millions) in that same year. b) Describe the scatterplot using CDOFS. c) Calculate the correlation coefficient r. d) Write the equation for the least-squares regression line. e) Interpret the slope of the equation. f) In 2019, there were 276 million vehicles registered in the United States. Use the regression equation to predict the life. expectancy for a baby born in 2019. Show your work. g) Find and interpret the residual for the year when 247.3 million vehicles were registered in the United States. Show your work.