Question

A(n) = 4n - 20

Which equation represents the inverse function n(a), which takes the money
raised as input and returns the number of tickets sold as output?

Answer 1

Option A.

Explanation:

The given function is

`a(n)=4n-20`

It can be written as

`a=4n-20`

Add 20 on both sides.

`a+20=4n-20+20`

`a+20=4n`

Divide both sides by 4.

`(a+20)/(4)=n`

Interchange the sides.

`n=(a+20)/(4)`

Now, it can written in the function form as

`n(a)=(a+20)/(4)`

Therefore, the correct option is A.