Triangles DEF and D'E'F' are shown on the coordinate plane below:
F D
S43N
E 1
(x,y) → (-y, x)
5
-8-7- -5-4-3-2-1
D
2 E
(x,y) → (y, -x)
E
(x,y) → (x, y)
-2
1
23
3
+
10
5
6
What rotation was applied to triangle DEF to create triangle D'E'F'?
F
(x,y) → (-x, -y)
+
1 2 3 4 5 6 7 8