The table below shows the amount of mold, y, on a surface at various times, x. x (minutes) 2 4 6
y 4 64 1024

Which function could be used to model the amount of mold on the surface after x minutes?

Group of answer choices

1. one fourth times 4 to the x-th power

2. one fourth x to the fourth power

3. 1 over 16 times 8 to the x-th power

4. 1 over 16 x to the eighth power