Which one is bigger and smaller? 3.345 or 3.35

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.

Will mark brainliest! ( explain the answer too, it can be one sentence)

5/4 gallons of water fill 5/6 of a bucket how many gallons of water fill the entire bucket