What is the equation of this graphed line?

Can any one me with the answers to these questions asap?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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