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November 21, 2014

Homework Help: algebra

Posted by bianca on Saturday, February 26, 2011 at 9:03pm.

A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 apiece; when the price is lowered to $80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price of $75?

(100, 6.7) and(80,10.2)
slope = (10.2-6.7)/(80-100)=-7/40
form y=mx+b
6.7= )-7/40)*100 +b
b= 6.7 +17.5
b= 24.2

equation:
#sold = (-7/40)x + 24.2 million where x is price per unit.
#(75)=(-7/40)*75+ 24.2
# (75)= 11.075 million

Can this problem be graphed and how?

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