Which set of ordered pairs represents a function? {(2, –2), (1, 5), (-2, 2), (1, –3), (8, –1)}

{(-3, –1), (-7, 1), (–6, –1), (-8, 1), (2, –1)}

{(1, 8), (5, 2), (2, –5), (1, –3), (–2, 9)}

{(–3, 1), (6, 3), (4, 2), (6, –3), (1, –1)}

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