Chapter 4.3, Problem 93E

Female life expectancy. Refer to Problem $91$. Subsequent data indicated that life expectancy grew to $79.1$ years for females born during $1995\text{-}2000$ and to $79.7$ years for females born during $2000\text{-}2005$. Add the points $\left(15,79.1\right),\text{ and }\left(20,79.7\right)$ to the data set in Problem $91$. Using a graphing calculates to find a quadratic regression model for all foe data points. Graph the data and the model in the same viewing window.