Please someone help it’s due for a test

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Is this a polynomial function? i need to know asap

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done