1. The correlation between two variables, x and y, is always bigger than the standardized coefficient of a regression of y on x.

2. The slope from the regression of Y on X must be the same sign as the correlation between X and Y.

3. The constant in a regression line must be greater than or equal to zero.

4. The unstandardized slope in a regression of X on X = 1.

5. R2 can never be greater than 1.