# Math Help - show that R square is zero

1. ## show that R square is zero

A two-variable regression with no intercept is given as:

$Y_i=B_2X_i+u_i$

Show that the R-squared ( $R^2$) for this model is equal to zero.

I think I should show that the covariance of X and Y are zero?

2. ## Re: show that R square is zero

Hey wopashui.

There are quite a few formulas for R^2 and covariance would indeed be one way to show this.

3. ## Re: show that R square is zero

Originally Posted by chiro
Hey wopashui.

There are quite a few formulas for R^2 and covariance would indeed be one way to show this.
I can't end up getting zero by using the covariance, can you show me some steps of approaching this?

4. ## Re: show that R square is zero

What information do you have about the model and its constraints?

Econ 4706?

6. ## Re: show that R square is zero

No I mean the actual course material you are covering (specific topics, concepts, stuff like that).

I have no idea what that course is.