A movie studio is releasing a new DVD, and the studio estimates that if the DVD is priced at $19.99, it will sell 6.68 million copies, whereas if it is priced at $15.99, it will sell 11.27 million copies. If f is a linear function that gives the number of copies sold (in millions) at a given price, what is the slope of f? What does it represent in this context?

Question

anonymous · Answer

think of it as finding the equation of the line between the two points 
$(19.99,6.68)$ and $(15.99,11.27)$

anonymous · Answer

Okay, so then I would use the slope formula for those points?

anonymous · Answer

yes

anonymous · Answer

Okay, I came up with -1.15 for the slope

anonymous · Answer

i get $-1.1475$

anonymous · Answer

Yes, I just rounded

anonymous · Answer

Should I convert it to millions or not?