-10 -9 -8-7-6 --5-4 -3
10
9
8
7
6
5
4
3
2
1
-2 -10
-1
-2
-3
4
-5
d
-7
-8
-9
-10
+
1
2
3
4
5
6
7
8
9 10
What is the slope?