On which number line do the letters represent -1 and +7?
P
1
-8
-6
-4
-2
O
2
4
8
6
Q
P
H
-2 0 2
+
-8
-6
-4
4
6
oo
Р
Q
O
-6
-4
-2
0
2
4
6
8
P
Q
-8
-6
-4
-2
0
2
4
6
8
​