Question

Which of these lines best fits the data?
y
10
8
6
4-
2
y
10
8
8 10
6
4
2
0 2 4 6 8 10
Y+
10
8-
6-
4
2
0 2 4 6 8 10
10-
8-
6
4
2
0 2 4 6 8 10
X