What is the range of the function mapped below?

-3 ----> -4
-2 ----> 6
0 ----> 2
1 ----> 9
2 ----> 8

{-3, -2, 0, 1, 2}
{ 2,9}
{-4, 2, 6, 8}
{6}

The range of the function is {2, 9}.