A statistics student is asked to estimate y = β0 + β1x + ε. She calculates the following values: Σxi=220,Σ(xi−x⎯⎯)2Σxi⁢= 220, Σ(xi⁢− x¯)2= 440, Σ(xi−x⎯⎯)(yi−y⎯⎯)=−568Σ(xi⁢− x¯)(yi⁢− y¯) = −568, Σyi=385,Σ(yi−y⎯⎯)2Σ⁢yi⁢=385, Σ(yi⁢− y¯)2 = 1,120, n = 11. Which of the following is the sample regression equation?

a. yˆ=9.2−1.29xy^⁢ = 9.2⁢ −1.29x
b. yˆ=9.2+1.29xy^⁢ = 9.2⁢ + 1.29x
c. yˆ=60.80−1.29xy^⁢ = 60.80−1.29x
d. yˆ=60.80+1.29x