What is the range of this function?

What is the range of this function?
(5, 5)
(3, 1)
(8, 10)
(–3, –7)
(–1, 9)
(6, 10)

{-7, 1, 5, 9, 10}
{1, 3, 5, 6, 8}
{-3, –1, 3, 5, 6, 8}
{1, 5, 7, 9, 10}