The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct to two decimal places.)
| x |
15 |
10 |
15 |
18 |
6 |
13 |
14 |
18 |
21 |
8 |
| y |
24 |
32 |
21 |
23 |
32 |
18 |
34 |
32 |
23 |
25 |
(a) Find the equation of the line of best fit.
(b) Find se2.