Posted by **Kirk** on Sunday, July 24, 2011 at 4:11pm.

Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes. Write the equation for the number of boxes you sell as a function of the price you charge. Denote "b" for the number of boxes, and "p" for prices you charge, assume the function is linear.

- MAT101 -
**Damon**, Sunday, July 24, 2011 at 4:52pm
b = k p + c where k and c are constants

200 = k (3) + c

120 = k (4) + c

------------------subtract

80 = -1 k

so

k = -80

back to first eqn

200 = -80(3) + c

200 = -240 + c

c = 440

so

b = -80 p + 440

- MAT101 -
**Kirk**, Sunday, July 24, 2011 at 5:22pm
Thank you, I was stuck on this for several hours to how to write this out, thank you again!

## Answer this Question

## Related Questions

- Math - Suppose you have a cookie stand, and when you charge $3 per cookie box ...
- Math 101 - Suppose you have a cookie stand, and when you charge $3 per cookie ...
- MAT101 - 6. Suppose you have a lemonade stand, and when you charge $2 per cup of...
- MAT101 - 6. Suppose you have a lemonade stand, and when you charge $2 per cup of...
- Math - Suppose you have a lemonade stand, and when you charge $1 per cup of ...
- algebra - the basketball team is trying to raise $475 for new uniforms if they ...
- Algebra - a. Suppose that a market research company finds that at a price of p...
- math - have 10 boxes each box contains 50 peices and we're selling for 8.00 per ...
- Math - For a fundraiser the soccer team is planning to sell potting soil. The ...
- Algebra - . In this problem, we will analyze the profit found for sales of a ...