Please assist, this is a homework question I am stuck on

These two data sets have the same correlation coefficient. Choose the correct statement(s) that explain(s) why the correlation coefficients are the same. Check all that apply. Data set 1: X 2 3 4 5 6 7 y 2 1 4 3 7 5 6 Data set 2: X 1 2 3 4 5 6 7 y 5 4 7 6 10 8 9 O x has been changed by adding a constant. O y has been changed by multiplying by a constant. O y has been changed by adding a constant. O The values of x and y have been interchanged. x has been changed by multiplying by a constant. O The values of y have been changed by adding the values of x. O The values of x have been changed by adding the values of y