Which of the following tables models an exponential function?

x y
0 5
1 7
2 9
3 11

x y
0 5
1 10
2 20
3 40

x y
0 5
1 6
2 8
3 11

x y
0 5
1 10
2 15
3 20

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.