State the domain of the relation.

Discrete graph defined on the set of points negative four comma negative four and negative three comma negative one and negative two comma positive two and negative one comma positive five and zero comma positive eight.

{−4, −3, −2, −1, 0, 2, 5, 8}
{−4, −3, −2, −1, 0}
{−4, −3, −2, −1}
{−4, −1, 2, 5, 8}