what is the domain and range?

Answer:
Domain = {-2, 1, 2}
Range = {-1, 2, 3}
Step-by-step explanation:
Domain is the set of x values required to find the resulting y values.
From the graph, whatever the function is,
when x = -2, y = 2
x = 1, y = -1
x = 2, y = 3