Question

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 equals the number of nights Michelle has the movie. (2 points)


c(x) = 1.50 + 1.25x


c(x) = 1.50x + 1.25


c(x) = 2.75


c(x) = (1.50 + 1.25)x

These ones are soo confusing because I'm not the best at math

Answer 1

ok so you see how there is a $1.50 fee?

Answer 2

Yea

Answer 3

that is the price she is going to start at--it's our constant

do you know what a constant is?

Answer 4

Its a number by itself

Answer 5

yes, that's a good start. the constant is a number that is not going to change because,as you said, it is by itself.

now, we are going to need this 1.50 in our equation, so which option can we eliminate just from this ?

Answer 6

c(x) = 2.75

Answer 7

yes, good job!

ok now, it says she has to pay $1.25 for every night, and x is the number of nights she has it.

do you know how to write $1.25 per night with a variable?

Answer 8

I think so 1.25(x)
I might be wrong

Answer 9

no, you're exactly right!

(you don't need the parentheses though so you could remove them)

and now you can remove another option. do you know which one?

Answer 10

c(x) = 1.50x + 1.25

Answer 11

so we are now left with c(x) = 1.50 + 1.25x and c(x) = (1.50 + 1.25)x

so as you remember, we had 1.50 and 1.25x, so looking at these two options, do you know which shows the data we found?

Answer 12

c(x) = 1.50 + 1.25x

Answer 13

good job!!!

do you understand how you got this?

Answer 14

Well for the first time yes Thank you soo much

Answer 15

of course, glad to help !