SOLUTION: can you please help with this question? The average cost of online photos went from $0.50 per print to $0.15 per print between 2002 and 2009. What is the rate of change?

Question 1204086: can you please help with this question? The average cost of online photos went from $0.50 per print to $0.15 per print between 2002 and 2009. What is the rate of change?
Answer by ikleyn(52908) (Show Source): You can put this solution on YOUR website!
.


In this problem, the rate of change is  

    rate of change =  =  = -o.05  dollars per year.


Here the rate of change is NEGATIVE, reflecting the fact that the cost is decreasing.


To calculate, we take the difference "the future price MINUS the current price"
(the order is IMPORTANT).


Then we divide this difference by the time period duration (7 years in this problem).


The final value has the dimension "dollars per year".

Solved, with complete explanations.

RELATED QUESTIONS
Can you please help me with this problem: A photo-processing kiosk charges $0.25 for (answered by josmiceli)

A framer at a photo gallery wants to frame a print with a matte of uniform width all... (answered by josmiceli)

can you please solve this for me? A magazine is printing an article that has 21 pages. (answered by funmath)

plz help...!! Paula is the student council member responsible for planning an outdoor... (answered by ikleyn)

I need help please. For a fundraising project, your Math Club is publishing an art... (answered by Alex.33)

A store owner wants to place an ad. The local newspaper charges a fee of $650 plus $75... (answered by ikleyn)

at ferrarras print shop, there are two kinds of printing presses: model a can print 70... (answered by ikleyn)

A printer has two presses. One has a setup cost of $210 and can print the pages of a... (answered by Greenfinch)

Can you please help me solve this question? One computer printer can print a company's... (answered by ptaylor)