A study was conducted to detemine whether a the final grade of a student in an introductory psychology course is linearly related to his or her performance on the verbal ability test administered before college entrance. The verbal scores and final grades for 10 students are shown in the table
below.
Student Verbal Score 2 Final Grade y
1 42
150
2 166
81
3 66
76
4 28
36
5 76
93
6 40
45
17
128
33
8 164
174
9 31
135
10 42
49
Find the least squares line.
y
2 +