Ok, to show that she is incorrect we can use any other number in both equations and they will not be equal. the number she used does turn out equal but that does not mean the equations are equal. for example 2 times 3=6 3 to the power of 2 is 9
Assuming the question is in the wrong format and"date" is data. I chose X= 10,11,16,9,7,15,16,10 and Y= <span>96,51,62,58,89,81,46,51 the correlation cooefficent is -0.3351