In a two year setting Rod has earnings of $8000 this year and earnings of $25,000 next year. He can borrow or lend at an interest rate of 25%. Draw his budget line including endpoints. What is the slope of the budget line? What is the interpretation of the slope? Suppose that Rod could choose, instead, to earn $22,000 this year and $10,000 next year. Would Rod choose this second option? Why would it be wrong to add together year one earnings and year two earnings in deciding his choice? What must you do instead? Prove which he would prefer. Does his choice depend on anything other than financial considerations?