Posted by **Brett** on Wednesday, January 21, 2009 at 7:55pm.

Sorry, the last Question didn't post

Suppose Fred has a utility function of the form U = X ½ Y ½ . Fred has an income of $100, good X costs $1.00, and good Y costs $2.00. How much of good X and how much or good Y will Fred buy? Be sure to show all your work.

Ive aready drawn my graph and i know that under my budget constraint i could buy 100 of X only and 50 of y only. i also know that my slop is -2. i just can not figure out how to solve to find how much of good X and Y he will buy.

thanks

- ECONOMICS -
**economyst**, Thursday, January 22, 2009 at 10:21am
Your slope of -2 of the budget constraint is because Py/Px = 2.

To maximize, Fred will want (MUy/MUx) = Py/Px. So, first find marginal utilities. For MUx take the first derivative with respect to X.

MUx = (1/2)*X^(-1/2)*Y^(1/2)

MUy = (1/2)*X^(1/2)*Y^(-1/2)

So, MUy/MYx collapses to X/Y. And this ratio is constant for all levels of consumption. So, Fred maximizes when X/Y = 2. For every 2 Xs purchase, Fred will buy 1 Y. Fred, spending $100, will consume 50 X and 25 Y.

## Answer this Question

## Related Questions

- Economics - 2. Suppose Fred has a utility function of the form U = X ½ Y ½ . ...
- ECON - Suppose Fred has a utility function of the form U = X ½ Y ½ . Fred has an...
- economics - Suppose 15 peaches and 20 oranges need to be divided between fred ...
- Micro Economics - Briefly explain the following: (a)Economic cost and accounting...
- Economics - Suppose Fred and Ethel need to divide 20 pizza slices and 10 cans of...
- Math: - Fred’s net monthly income is $3933.12 Rental: $700 Car Payment: $363.75...
- college Econ - Suppose Fred and Ethel need to divide 20 pizza slices and 10 cans...
- economics - 1.. Suppose that U(x; y) = min(x; y) with px = 1 and py = 1. ...
- Economics (Equilibrium) - Suppose fred ethel ricky and lucy have the following ...
- economics - Consider a consumer who has an experienced utility function given ...

More Related Questions