Which point is located at (2,1)

How do you determine whether a relationship represented as as graph is linear or nonlinear

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

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).