The regression coefficient of y on x is ...

The regression coefficient of y on x is 2/3 and that of x on y is 4/3. The acute angle between the two regression lines is `tan ^(-1) k,` wher k is equal to :

A

`1/9`

B

`2/9`

C

`1/18`

D

`1/3`

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The correct Answer is:

C

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