Scientists are doing international research on water quality. To find out the relationship between the taste index (y) and the amount of magnesium (x: mg/l) by receiving samples from research institutes in each country, as a result of a survey on 8 people, the summarized statistics of each x and y are as follows. The sample mean of x is 11.05 and the sample variance is 10. The sample mean of y is 11.05 and the sample variance is 10. In addition,