A restaurant chain collected data on total fat (denoted by fat) in grams and the protein content in grams for various items on their menu. Some summary statistics of this data are shown below: protein fat Mean 32.6 33.9 Standard deviation 9.8 10.3 The least-squares regression equation for predicting total fact from protein content is fat = 3.6 + 0.9 x protein. Calculate the correlation between protein and fat