A site offers MP3 downloads with the following price structure: a $ fixed fee for a monthly subscription plus a fee of$. per song. Write a linear function to model the relationship between the number of songs downloaded and the total monthlycost. Let represent the number of songs downloaded and represent the total monthly cost (in dollars)of downloading songs. *25 pts*

L=cy + X

Step-by-step explanation:

let x be the fixed monthly cost y the cost per song and c the number of songs.

- Let L represent the total monthly cost

#This is a linear function that can be expressed as:

X is a constant value that wont vary with the number of songs downloaded.

Hence, the linear equation is written as L=cy +X

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."