Question

An advertising agency increased their fees to an $80 setup fee plus $4 for every advertisement. Write a rule forthe new fee. Write ordered pairs for the fees for 10, 20, 30, and 40 advertisements.

Answer 1

Given that the advertising company had a setup fee of $80, this would mean that

`y=80`

Next, since it is stated that they add $4 for every advertisment, we let x as the number of advertisement, and this would mean that we add 4x to the equation that we initially had

`y=80+4x`

Now, to write ordered pairs for the fees for 10, 20, 30, and 40 advertisements, we just have to substitute these values to the equation

x = 10

`y=80+4x`
`y=80+4(10)`
`y=80+40`
`y=120`

( 10, 120 )

x = 20

`y=80+4(20)`
`y=80+80`
`y=160`

( 20, 160 )

x = 30

`y=80+4(30)`
`y=80+120`