What is the slope of the trend line, and what is it's meaning in practical terms? During which year was the life expectancy clearly higher than would have been expected from the linear trend? If the linear trend established by these data persisted through 2020, what would the life expectancy be for a child born in 2020? (round your answer one decimal place) If the linear trend established by these data persisted through 2300, what would be the life expectancy of a child born in 2300? (round your answer one decimal place) Does this make sense?