Question

If the lines of regression coincide, then the value of the correlation coefficient is:

• A. $0$
• B. $1$
• C. $0.5$
• D. $0.33$

Answer 1

The correct option is B

$1$

Explanation for the correct option:

If the two lines of regression coincide, then the value of their coefficient correlation will be $1$ or $-1$.

When the coefficient of correlation is perfectly negative or positive that means the two regression lines will be coinciding.

Amongst the given options, $-1$ isn't available.

So, correlation coefficient is $1$.

Hence, option (B) $1$, is the correct answer.