1. If the correlation coefficient of two variables is less than zero, the slope of the regression line for the variables?

a.is negative

b.is positive

c.zero d.could be negative or positive if regression is Y on X, or X on Y.

d.none of above

2.The correlation coefficient of the variables X and Y is -0.8, the SD of X is 10, the SD of Y is 3, and the regression line for regressing Y on X passes through the origin.The slope of the regression line(Q2)

a.is -1.25

b.is -0.8

c.is 0

d.is 0.8

e.is 1.25

f.cannot be determined from the information given

g.none of the above

3.A line passes through the points (2, -2) and (-5, 0).The equation of the line is

Y=( )times X+( )