Answer:
y 4,
y ∈ [-∞, 4]
Step-by-step explanation:
Remember, the range of the function is all possible output values or y values.
As per the graph, it appears that the output, the y value, is less than or equal to 4. Hence:
y 4
or
y ∈ [-∞, 4]
is the range, both are the same, they are just different ways of writing it.