This might be more of an economical question, but perhaps some of you might've come across it before as math is involved;
A person P prefers bundle (x1,x2) over (y1,y2) if (x1*x2) > (y1*y2).
What is then the utility function? And how would I plot the indifference curves, and what can I say about the preferences? Rational, complete, transitive?
I have a hard time grasping the concept of a utility function in general.. it seems so... arbitrary?