Help I have no idea

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What is the domain of the function below? point) { (0,2) (3,1),(5,2),(8,4)}
{1,2,4}
{0,3,5,8\}
{0,1,2,3,4,5,8}
{ (0,2),(3,1),(5,2),(8,4)}

the domain is the set of x values that you see in your list