Answer: The correct option is: all real numbers such that −3≤y≤1.
Step-by-step explanation: The range of the step function f(x) is the set of all possible y-values that the function can take. From the given information about the step graph, we can see that the y-values of the step function lie between -3 and 1, inclusive. The left-most segment starts at y = 1, and each subsequent segment is 1 unit lower. The lowest point on the right-most segment is y = -2.