The domain is simply the x-values given: `x = {−4, −2, 2, 3}`

The range consists of the `f(x)`-values given: `f(x) = {−1, 1, 2, 2.5}`

Here is the graph of our discontinuous function.

1 2 3 4 -1 -2 -3 -4 1 2 3 4 -1 -2 -3 x y (3, 2) (2, -1) (-4, 1)
(-2, 2.5)