Marcel claims that the graph below represents a function.
y
4
3+
2+
-4 -3 -2 -1
-1+
1
+X
2 3 4
-2+
3-
-47
State whether Marcel is correct. Justify your answer.

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.