Question

If $4x-5y+33=0$ and $20x-9y-107=0$ are two lines of regression. Find the regression coefficients $b_{xy}$

• A. $\frac{1}{20}$
• B. $\frac{1}{10}$
• C. $\frac{1}{30}$
• D. $\frac{9}{20}$

Answer 1

The correct option is D $\frac{9}{20}$

$=20x-9y-107=0$

$\Rightarrow y=\frac{107}{20}+\frac{9}{20}x$

so, $\Rightarrow b_{yx}=\frac{9}{20}$