A regression line is used to satisfactorily describe the relationship between amount of hair per square inch and drying time (in minutes) of 17 participants in a hair dryer performance study. The regression analysis is shown. Variable Coeff SE Coeff t Ratio p-Value Constant 3.2893 0. 0217 151.58 50 . 0001 Amount of hair 1.2874 0.1635 7. 87 50 . 0001 R squared = 88.5% R squared (adj) = 87.9% Which expression should be used to compute a 90 percent confidence interval for the slope of the regression line? 1.2874 + 1.74(0.1635) 1.2874 + 1.746(0.1635) 1.2874 + 1.753(0.1635) 3.2893 = 1.753(0.0217) 3.2893 + 1.746(0.0217)