Question

Question
The costs to buy and download a song at four different online retailers are shown below.

Use the images to answer the question.

Online Retailer A

A line graph titled Cost of Downloading Songs. The y-axis is labeled cost in dollars and is marked from 1 to 10. The x-axis is labeled number of songs, and is marked, in twos from 2 to 18.
▶Click for Long Desc

Online Retailer B

Number of Songs Cost
Number of songs

0

1

2

3

4

5

Cost (in dollars)

1

1.25

1.5

1.75

2

2.25

Online Retailer C

y=0.35x+1.5


Online Retailer D

We charge a flat rate of $0.60 to download a song with no hidden fees!
Which online retailer charges the least amount to buy and download 8 songs?

(1 point)
Responses

Online Retailer A
Online Retailer A

Online Retailer D
Online Retailer D

Online Retailer B
Online Retailer B

Online Retailer C
Online Retailer C

Answer 1

Online Retailer B.

Work:
- Retailer B: cost = 1 + 0.25x, so for 8 songs: 1 + 0.25(8) = $3.00
- Retailer C: y = 0.35x + 1.5 → y(8) = 0.35(8) + 1.5 = $4.30
- Retailer D: $0.60 per song → 0.60(8) = $4.80
- Retailer A (from the graph) is more than $3 for 8 songs.

Therefore Retailer B is the cheapest.