ent of Applied Chemistry / Design of expertments Which R square value belongs to the best fitting? of Select one: a. 0.5 b. 0.9 ON 0.0.05 d. 0.998 e. O A linear regression to estimate the relation between General Motors' stock returns and the market's return gives the best fitting line that represents the relation between the stock and the market. The slope of this line is our estimate of Select one: A. volatility B. risk-free rate C. alpha D. beta