Whats the difinition of an outlier?

The amount of energy it takes to lift a box might be a function of which of the following

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.

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi