Find the value of sample covariance in linear regression model.
In fitting simple linear regression model Yi ~ N (α + β xi, σ^{2}) to the following data:
Yi

42.87

43.64

44.87

43.8

44.68

44.99

44.92

46.05

Xi

3.579

3.751

4.57

4.32

3.79

4.054

4.138

5.159

The value of S_{xy} is:
1. 185.82
2. 1486.57
3. 2.76
4. 371.29
5. 185.47