The equation is c = 1.45 n
Total cost of 25 songs is $36.25
Step-by-step explanation:
The form of the linear equation is y = m x + b, where
- m is the rate of change
- b is the initial value (value y at x = 0)
∵ The cost of downloaded one digital song is $1.45
∵ The cost of downloaded two digital song is $2.90
∵ The cost of downloaded five digital song is $7.25
- There is a linear relation between the cost of downloading
the songs and the number of songs
∵ 2.90 = 2 × 1.45
∵ 7.25 = 5 × 1.45
∴ The total cost of downloaded songs is the product of the number
of songs and the cost per song
∵ The cost per song is 1.45
∵ n is the independent variable
∴ n represents the number of songs
∵ c is the dependent variable
∴ c represents the total cost of n songs
- Now we can write the linear equation
∴ c = 1.45 n
The equation is c = 1.45 n
∵ 25 digital songs downloaded
∴ n = 25
∵ c = 1.45 n
∴ c = 1.45(25)
∴ c = 36.26
Total cost of 25 songs is $36.25
Learn more:
You can learn more about the linear equation in brainly.com/question/4152194
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