Which of the following tables represents a function?

Answer:
B, because B is the only choice with only 1 of each x value.
Step-by-step explanation:
Answer:The second table
Step-by-step explanation: when graphing a function you can check to see if it is by connecting the dots if you are unable to draw a line through what youve graphed its a function. Also the x known as the domain should not repeat.