Christina is using her computer to design invitations to her birthday party. The text of the invitation is contained in a rectan
2 answers:
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Answer:
The third choice
Step-by-step explanation:
a relation is a function if an input has at most one output for a given input
Choices 1, 2 and 4 are not functions as they have two different outputs for the same input. (See the red ovals)
