Question

The average cost of online photos decreased

Answer 1

Answer:

The average rate of change is -0.034 which means that the decrease is -0.034 in the cost of per print per year

Step-by-step explanation:

Given that

Price of print in 2002 = p1 =$0.50

Price of print in 2013 = p2 =$0.13

y1 = 2002

y2 = 2013

The rate of change is given by the formula:

$r = \frac{decrease}{run}$

Here decrease is the change in price and run is the difference in years.

Mathematically, it can be written as:

$r = \frac{p_2-p_1}{y_2-y_1}$

Putting the values

$r =\frac{0.13-0.50}{2013-2002}\\r = \frac{-0.37}{11}\\r =-0.0336\\r = -0.034$

Hence,

The average rate of change is -0.034 which means that the decrease is -0.034 in the cost of per print per year