WILL MEDAL!

Michelle rents a movie for a flat fee of
$1.50 plus an additional $1.25 for each night she keeps the movie. Choose the cost function that represents this scenario if x = the number of nights Michelle has the movie.

A) c(x) = 1.50 + 1.25x
B) c(x) = 1.50x + 1.25
C) c(x) = 2.75
D) c(x) = (1.50 + 1.25)x

Question

WILL MEDAL! 

Michelle rents a movie for a flat fee of 
$1.50 plus an additional $1.25 for each night she keeps the movie. Choose the cost function that represents this scenario if x = the number of nights Michelle has the movie. 

A) c(x) = 1.50 + 1.25x
B) c(x) = 1.50x + 1.25
C) c(x) = 2.75
D) c(x) = (1.50 + 1.25)x

owlcoffee · Answer

So, let's first recognize which is the value hat remains constant, and the one that varies.
Which ones do you think they are?

anonymous · Answer

Constant is the cost for each night she keeps the movie? And the one that varies is the $1.25

owlcoffee · Answer

yes, and now, since it's the only value that varies, we can say for sure that the first 1.50 are the initial ones, so thereby:
$$f(x)=1.50+1.25x$$
Where "x" represents the nights she has the movie.

carlyleukhardt · Answer

I did the math it would be a

anonymous · Answer

Thank you so much @carlyleukhardt! I really appreciate it, but I want to understand it too, I'm not just looking for the answer. Super appreciative of your help though, thank you so much!

owlcoffee · Answer

If you have any questions, ask away.

anonymous · Answer

@Owlcoffee No actually i'm good! Thank you so much for helping me!! (: