The data in the table represent the weights of various domesticcars and their miles per gallon in the city for the 2008 modelyear. For these​ data, the​ least-squares regression line isModifyingAbove y with -0.006x + 42.216. A twelfth car weighs 3,425pounds and gets 12 miles per gallon.
​(a) Compute the coefficient of determination of the expandeddata set. What effect does the addition of the twelfth car to thedata set have on Rsquared​? ​
(b) Is the point corresponding to the twelfth car​ influential?Is it an​ outlier?
Car, Weight (pounds) x, Miles per Gallon y
1 3766 20
2 3989 21
3 3532 20
4 3170 22
5 2575 28
6 3735 20
7 2605 27
8 3772 18
9 3310 19
10 2993 26
11 2755 25
