A random sample of 11 students produced the following data, where x is the hours spent studying per month, and y is the midterm exam score (out of a maximum of 100 points). The data are presented below in the table of values. x y
7 30
10 45
12 45
14 42
17 48
20 47
23 65
26 78
28 87
29 85
31 80
What is the value of the intercept of the regression line, b, rounded to one decimal place?