Enter the number that belongs in the green box

What is 1/3x5 on anuber line what does it look like on a number line

Which of the functions below could have created this graph?

Which of the following exponential functions goes through the points (1, 6) and (2, 12)? f(x) = 3(2)x f(x) = 2(3)x f(x) = 3(2)−x f(x) = 2(3)−x