Objective [2.10]

Situation:
An online retail company tracked total number of purchases monthly. In June 2007 they were 3,850 purchases and in January 2008 there were 3,640.

The purchases followed a linear model of the form   $\displaystyle {p}={S}{\left({t}\right)}={r}{t}+{i}$   where $\displaystyle {p}$ purchases is in 1000's and $\displaystyle {t}$ is months where January 2007=0

A.
Sales are Select an answer Decreasing Increasing at a constant rate of Select an answer $/purchases $ months/purchase purchases/month purchases months purchases/$ - pick the correct units

B. Write out the linear model function with the parameter values `p=S(t)=Preview Question 6 Part 4 of 7  

Now answer the following questions using this model

C. What does the model predict total purchases will be in September 2010?  

D. In what month and year does the model predict sales will be 2,410?   Select an answer January February March April May June July August September October November December