Which of the following statements is correct The correlation

Which of the following statements is correct? The correlation always has the same units as the y variable, but not the x variable. Changing the units of measurements of x or y does not change the value of the correlation r. The correlation always has the same units as the x variable, but not the y variable. A negative value for the correlation r indicates the data are strongly unassociated.

Solution

Answer is b.) i.e Changing the units of measurement of x and y does not change the value of the correlation r