SOLUTION: Over a 3 week period, the price of an MP3 player dropped steadily, from $126 to $90. What signed number represents the average weekly change in the price of the MP3 player over

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Over a 3 week period, the price of an MP3 player dropped steadily, from $126 to $90. What signed number represents the average weekly change in the price of the MP3 player over       Log On


   

Question 978232: Over a 3 week period, the price of an MP3 player dropped steadily, from $126 to $90.
What signed number represents the average weekly change in the price of the MP3 player over this period?






Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Change in price: 90 - 126 = -36

Notice how the result is negative

Change in weeks = 3

-------------------------------------------------------

Average weekly change = (change in price)/(change in weeks)

Average weekly change = (-36)/(3)

Average weekly change = -12

So that means the MP3 player dropped in price by $12 each week.