I'd like to challenge you to find an algebraic relationship between b and r.
Can you tell me what is b / r?
Is it 1 / Σ(y - y-bar)²?
Is it Σ(x - x-bar)² / Σ(y - y-bar)²?
Is it the square root of Σ(x - x-bar)² / Σ(y - y-bar)²
Or perhaps is it--choose the right answer.