this is a complex one

Question

Total DVD and Blu-ray disc sales in 2009 were $8.73 billion. For the purposes of this problem, you will combine DVD and Blue-ray disk sales into one category of DVD sales. A study by In-Stat predicted that "physical disc sales will decline by $4.6 billion by 2014," and that "streaming, on the other hand, should grow from its current $2.3 billion to $6.3 billion over the same time period (2009–2014).What is the slope, including units, of the model for streaming videos

Answer 1

They are asking for the slope of the model for streaming videos.

The information reference to the decline in DVD sales is

extraneous... unneeded ... information.

 

Streaming Videos:

Let 2009 = year zero

2014 = year 5

 

Your axes are x=years for horizontal

y = dollars in billions of dollars

 

 

We have 2 points:  (0, 2.3), (5, 6.3)

Slope = (6.3-2.3)/(5-0) = 4/5 or 0.8 billions $ per year