# Homework Help: Stats regression problem, need hlep QUICK

1. Feb 7, 2005

### aisha

If the regression equation is y=2.3-1(x) and r^2 = 0.78, what is the value of the coefficient of correlation?

my answer was 0.88 and i got it wrong, is it -0.88 because of the negative slope in the equation??? plz help fast.. thnx

2. Feb 8, 2005

remember that a square root can have $$\pm a$$ as a root. Since the correlation is negative we must have a negative r.