# 7

It is determined that there is no relationship between the consumption of paper and water in a city.

1 What is the value of the covariance of these variables?

cov(X,Y) = 0

2 What is the linear correlation coefficient?

r = 0

3 Determine the equations of the two regression lines and interpret the relationship.

= k_{1} , = k_{2} k_{1}, k_{2 } .

The lines are parallel to the axis and perpendicular to each other.

Subject

Site