HELPPPPPPPPPPPPPPPPPPPPP

Answer:
A
Step-by-step explanation:
A function from x to y cannot have different values of y for the same value of x. Therefore, A is not a function because for two of the same value of X (10) you get two different values of Y (5 and 15). Therefore, A is not a function
Answer:
A is not a function
Step-by-step explanation: Because a function can't have two x values that have different y values. Because if you have a graph then there would be two points on top of each other.