Need help asapppppppp

It is not a function.

Step-by-step explanation:

Input (x)

Output (y)

An input can never have two outputs

2 = 20

2 = 40

makes it not a function

10,10,10,20 i hope that helps but if not its cause i dont really understand the question

Table A

Step-by-step explanation:

A relation that does not repeat a input is a function.

Table A's inputs are:

{5,7,8}

The inputs do not repeat, so they are a function.

Tables B, C, and D have at least one input repeating, so they are not functions.

Brainilest appreciated.