No links or weird answers, please :(
Are all of these graphs functions? Explain why or why not.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test