Question

what is the function graph if both the domain and range is (−∞, ∞)

Answer 1

Answer:

(−∞, ∞) and (−∞, ∞)

Step-by-step explanation:

One example (of many) might be y = 2x.  The domain and range of this function are (−∞, ∞) and (−∞, ∞).