If two variables X and Y are independent, then what is thecorrelation coefficient between them ?

If the regression coefficient of x on y and y on x are -(1)/(2) and -(1)/(8) respectively, then what is the correlation coefficient between x and y? -(1)/(4)

Let the correlation coefficient between X and Y be 0.6. Random variables Z and W are defined as Z=X+5 and W=(Y)/(3) . What is the correlation coefficient between Z and W?

Answer the following questions (Alternatives are to be noted): If the relation between two variables x and y is y = 2x + 3 , find the correlation coefficient between x and y.

If two regression lines between height (x) and weight (y) are 4y-15x+410=0 and 30x-2y-825=0 , then what will be the correlation coefficient between height and weight?