Which number is not like the others? 0246, 4678, 7123, 3456, 2456, 8123

Given the graphed function below which of the following orders pairs are found on the inverse function

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day