Question

If the coefficient of correlation r is -0.6 and coefficient of regression of y on x is -0.9, then the coefficient of regression of x on y is 
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Answer 1

Answer:

We know that, for two variables x and y

r=±bxby

Where bx and by are the regression coefficients 

and r is the correlation coefficient between x and y

Also, the sign of r is same as the sign of regression coefficients

∴r=−2−3×6−1

∴r=2−1