A random sample of 10 students produced the following data,
where x is the hours spent studying per month, and y is the 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
What is the value of the intercept of the regression line, b,
rounded to one decimal place?