Answer: Your answer is the third one, a function assigns to each input exactly one output.
If you have a true function, there will only be one output for each input, if you had more than one, it isn't a function.
Answer:
i believe C
Step-by-step explanation:
There are 30 players in the tournament
Replace x with a couple of numbers, solve for Y them mark those points on the graph and connect with a line.
See picture: