Hi I got some questions wrong on an assignment i was wondering why I got them wrong and what was the correct answer may you help me?

Question

anonymous · Answer

A video game club charges a fixed annual membership fee of $19 and $5 per video game rented. Let f(n) represent the total annual cost of renting n video games. Which of the following functions best represents the relationship between f(n) and n if the membership was decreased by $10 the next year?

 f(n) = 19n + 5

 f(n) = 5n + 9

 f(n) = 4n + 29

 f(n) = 5n + 29

Points earned on this question: 0

anonymous · Answer

Which of the following equations best represents the graph of a function f(m)?

 f(y) = m

 f(x) = m

 y = f(m)

 x = f(m)

Points earned on this question: 0

anonymous · Answer

for the 1st one i got d and the second i got b i have others but i should just start w. those :)

anonymous · Answer

@hartnn @satellite73 @sammixboo

ribhu · Answer

the 1st seem to be b as the membership is decreased by $10 @hello_hey

hartnn · Answer

*decreased by 10*

19 -10 = ...

anonymous · Answer

9

hartnn · Answer

yep, so 5n +9

anonymous · Answer

may you explain everything to me like just pretend i was asking the question how would you explain it to me ?

ribhu · Answer

second one is y = f(m)

hartnn · Answer

sure,
$5 per video game,
so how many dollars for 'n' videogames?

anonymous · Answer

actually i get it thanks :)