Needed ASAP :3 What is the domain of the relation shown below?
{(-2, -9), (-1, -3), (0, -1), (1, -3), (2, -9)}
1.
{-2, -1, 0, 1, 2}
2.
{-9, -3, -1}
3.
{-9, -3, -2, -1, 0, 1, 2}
4.
{-9, -9, -3, -3, -2, -1,-1, 0, 1, 2}

The correct answer here is c

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

Iagree that is the answer to the question