Calculate the slope of the line:
8
6
72
2
←10
10 -8 -6 -4
-2
2
4
6
8
10
-2
4
-6
8
-10
8
6
72
2
←10
10 -8 -6 -4
-2
2
4
6
8
10
-2
4
-6
8
-10