The accompanying data represent the number of days absent, x, and the final exam score, y, for a sample of college students in a general education course at a large state university.

Number of absences, x Final exam score, y

0 89.8

1 86.1

2 83.4

3 80.3

4 79.1

5 73.5

6 63.9

7 70.9

8 65.2

9 66.5

Find the least-squares regression line treating number of absences as the explanatory variable and the final exam score as the response variable.