# Can someone help me on this one!

1. Sep 14, 2004

### wmosley

For a certain commodity, the demand equation is given by D= -5p + 5=. At a price of $1, twelve units of the commodity are supplied. If the supply equation is linear and the market price is$4, find the supply equation.

For this one I have come up with a formula of:

s= ap+b where p if the varialbe, price, and a,b are constants

s is supply.

I think I have to find a and b but amd not sure.

Can someone help me with figure this one out...

2. Sep 14, 2004

### CRGreathouse

First you'll need to find out the amount supplied at the market price. Market price is when supply equals demand.

Do you have the equation correct? If D = -5p + 5 and the market price is \$4, then you're working in negatives.... Did you mean -5p + 50?

3. Sep 14, 2004

### Alkatran

Oh great, he found his way here, too.

He's already posted half his homework here

So don't bother answering.