Answer:
D)
not a function, an input has 2 different outputs
Explanation:
To determine if a relation is a function you need to see if each input has one and only one output. Since that is not the case here the correct answer is relation, an input has 2 different outputs.
Thats the example from usatestprep.
Im in connexus and got the answser wrong because of the girl/boy that answered the question too, but thats the right answer.