4. Consider the regression model Yi = + A Xi + lit. Suppose that the estimated OLS regression line is = 9.72 (there is no mistake in this equation). Which of the following is definitely true? C) C) C) C) C) C) There is insufficient variation in the variable X For every i, = O The regression R2 is zero None of the other options is correct would be estimated imprecisely For every i, = O 4. Consider the regression model Yi = + A Xi + lit. Suppose that the estimated OLS regression line is = 9.72 (there is no mistake in this equation). Which of the following is definitely true? C) C) C) C) C) C) There is insufficient variation in the variable X For every i, = O The regression R2 is zero None of the other options is correct would be estimated imprecisely For every i, = O