A random sample of 11 laborers produced the following data, where x is the number of training sessions completed, and y is the number of errors found during one shift. The data are presented below in the table of values:
x y
10 68
10 60
11 57
13 57
15 57
17 39
17 36
18 31
22 18
27 18
27 16
What is the value of the slope of the regression line, m, rounded to three decimal places?
Provide your answer below: