A regression model is desired relating temperature and the proportion of impurity from a solid substance passing through solid helium. Temperature is listed in degrees centigrade. The data are as presented here.,(a) Fit a linear regression model.,(b) Does it appear that the proportion of impurities passing through helium increases the temperature as it approaches —273 degrees centigrade?,(c) Find R2.,(d) Based on the information above, does the linear model seem appropriate? What additional information would you need to better answer thatquestion?

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