A. Functions. That would be my guess anyways. Hope I helped you out.
I once heard that it does break down into energy however I'm not sure on how entirely true that is. I'd say sure.
Constant of propotionality is 0.25.
Direct proportionality means that the dependence between the two variable, x and y in this case, is such that the quotient of those two variables is constant.
y/x=0.25 . Quotient of x and y is constant so we can say that x and y are directly proportional.
to be nice to someone cheer them up and have fun time together