Objective [2.5 and 2.6]
Situation: You are developing plans to launch a new iphone application program(app) called "Log me in Ignition" and you have just concluded a marketing study with focus groups.

A Relevant Relationship: The quantity of purchases of your "app" will depend on the price you set
Let, $\displaystyle {p}$, be the price in $, $\displaystyle {q}$ be the number of apps paid for and downloaded per week globally in thousands,
and $\displaystyle {A}$ be the name of the relationship

Over a small interval of prices from $7.40 to $9.90 the relationship is linear.
When the price is $7.40 the marketing survey indicates that 9,560 apps will be demanded per week and
when the price is $9.90 the marketing survey indicates that 8,060 apps will be demanded per week

So assuming a linear model from $7.40 to $9.90

A. What is the constant demand rate? Select an answer apps $/app apps/$ $ - pick the correct units

B. Write out the model function with parameter values $\displaystyle {q}={A}{\left({p}\right)}=$Preview Question 6 Part 3 of 5  

Now answer the following questions using this model rounding as indicated

C. What should the price be if the weekly quantity of apps demanded is 9,320?   $ , to the nearest $0.01

D. What would be the weekly global quantity demanded if the price is $9.40?   , to the nearest 10 sales