the domain tells that the how much the variable x is varying horizontally from one end to another end of the graph
in this graph, we can see that there are two points that are starting and endpoint
the starting of the graph is from x = -2 and it is ending at x = 4
but at x = 4 the graph is showing a void circle that means x is just less than 4 but it is not 4
so the domain is [-2, 4)
and the range represents y highest value and lowest value.
so the range of the graph is y = -3 to y = 3
at y = - 3 so we will this ) because -3 is not the graph, the value of y is just less than.
so the ranges is (-3, 3]