Question

A jeweler orders necklaces from a website that offers $6 shipping for any-size order. Each necklace costs $7. The jeweler wants to know the total cost of ordering n necklaces. What is the independent (input) variable?

Answer 1

Answer:

c = $7n + $6

Step-by-step explanation:

$6 shipping for any size

$7 per necklace

let n equal the quantity of necklaces and c equal the total cost.

you buy n amount of necklaces and add the shipping cost to find your cost.

Answer 2

Answer:

What is the independent (input) variable?

n, the number of necklaces

What is the dependent (output) variable?

c, the total cost in dollars

What is the domain?  

n = 0, 1, 2, 3...

Which equation expresses the order’s total cost, c, as a function of the number of necklaces, n?

c(n) = 7n + 6

Which expression means “the total cost, including shipping, of 5 necklaces”?

c(5)

Step-by-step explanation: