What is the r-value of the following data, to three decimal places

The r-value of the following data to three decimal places is:

                        r= -0.828

The correlation coefficient i.e. r is calculated by the formula:

where n is the sample size.

i.e. here n=5

             x        y          x²          y²            xy

              4       26       16         676          104

              5        11        25         121             55

              8        13       64        169            104

              9         2        81           4              18

              13        1        169         1               13

∑         39      53     355        971           294

Hence, the correlation coefficient is calculated as follows:

       Hence, the r-value is:

                 r= -0.828

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation: