HELP ME PLEASE SO I CAN PASS!! please everyone take a look at this and see if you can help.

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.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

In a grapefruit eating contest, sal ate 5 1/3 grapefruits in 2 minutes. if the world record is 7 1/6 grapefruits in 3 minutes, how many grapefruits would sal have had to eat in the next minute to tie the record