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A regression model is desired relating temperalure and the proportion of impurities passing through solid helium. Temperature is listed in degrees oengrade. The data are as follows: Temperature {\"C} Pmportiun of Impurities 255.7 H.224 264.5 0.453 2553 0.4?5 2TD.D 0.?(15 2T2.D [LII 222.5 (1.935 272.5 H.961 222.3 0.929 222.9 0.99] {a} Fit a linear regression model. {it} Does it appear that the pro portion of impurities passing through helium increases as the temperature approaches 2T3 degrees oentigrade? {c} Find R2. {d} Based on the information above, does the linear model seem appropriate? What additional inforrhaljon would you need to better answerthat question? \f\f\f