An estate agent suspects that a linear relationship exists between the number of houses sold (y) and the monthly loan payments (x). He analyses the following data over the past five months:

Monthly Loan Payments in R1000's Number of houses sold

3.7 16

5.6 25

7.5 80

18.9 45

28.4 12

The slope of the regression line is approximately

[1] 0,09.

[2] 10,53.

[3] 44,03.

[4] 0,25.

[5] 0,66.