B: Making the call $($page $4)$

Netflix made headlines in September $2011$ when it split its streaming video service and its DVD$-$by$-$mail service into two companies. This decision was based on projections that streaming videos would replace DVDs in the future. In this problem, you will explore these projections.

Total DVD and Blu$-$ray disc sales in $2009$ were $$8\mathrm{.}73$ billion. For the purposes of this problem, you will combine DVD and Blue$-$ray disc sales into one category of disc sales. A study by In$-$Stat predicted that "physical disc sales will decline by $$4\mathrm{.}6$ billion by $2014,"$ and that "streaming, on the other hand, should grow from its current $$2\mathrm{.}3$ billion to $$6\mathrm{.}3$ billion over the same time period $(2009-2014)."1$

If the In$-$Stat prediction held true, what is the average rate of change for the relationship between disc sales and year?

The average rate of change for the relationship between disc sales and year is $\frac{\text{b}\text{i}\text{l}\text{l}\text{i}\text{o}\text{n}}{1}.$

This indicates that sales of discs $($increased$/$decreased$)$

at a rate of $?$ billion per year.

Type here to search