Is -5/11 equivalent to -5/-11 ? Why or why not?

How do i do this? i don’t understand

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

What are two numbers that have a sum of 15