这怎么辨别百分比带入？

问题如下：

In a CAPM that regresses Wells Fargo’s excess returns on the market’s excess returns, the coefficients on monthly data are α = 0.1 and β = 1.2. What is the expected excess return on Wells Fargo when the excess return on the market is 3.5%?

选项：

A.

14.2%

B.

5.0%

C.

3.5%

D.

1.2%

解释：

The expected return is 0.1+1.2*3.5%=14.2%. This value is the fitted value from the linear regression when the market return is 3.5%.