Question

The table shows the cost of downloading songs

What does the rate of change mean in this situation?

A. The cost increases $5.00 for each additional song that is downloaded.
B. The cost increases $2.50for each additional song that is downloaded
C. The cost increases $0.25 for each additional song that is downloaded
D. The cost increases $1.25 for each additional song that is downloaded

Plz explain if you can

Answer 1

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Answer 2

Answer: D. The cost increases $1.25 for each additional song that is downloaded

Explanation:

Rate of change for every function is given by :-

`\text{Rate of change}=\frac{\text{Change in dependent variable}}{\text{Change in independent variable}}`

Here, Independent variable= number of songs

Dependent variable = cost

From the given table , it can be seen that the rate of change of cost per number of songs is 1.25 :-

`[(1.25-0)/(1-0)=(1.25)/(1)=1.25]`

Since it is positive.

It means that "The cost increases $1.25 for each additional song that is downloaded

"