Which set of ordered pairs is not a function? A)(2, 3),(4,9), (3, 8), (4, 15)
B) (-9, 4), (-6, 3), (-2, 8), (0, 21)
C) (1, 2), (3,5), (6,9), (7, 11)​

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