Choice a is a good one by the way
Answer: A
Step-by-step explanation: A function means that your x can only have one y but your y can have multiple x's.
I believe it would be the second option....
Answer: The answer would be 72/97
Step-by-step explanation: Sin = opposite/hypotenuse. So 72 is opposite angle C and 97 is the hypotenuse (Longest Side).
The formula is base x height