Raffle tickets are being sold for a fundraiser. The function a (n) relates the

amount of money raised to the number of tickets sold, n.

It takes as input the number of tickets sold and returns as output the amount

of money raised.

a (n) = 3n - 25

Which equation represents the inverse function n (a), which takes the money

raised as input and returns the number of tickets sold as output?

Question

Jake Zimmerman

Mathematics

9 August, 01:58

Raffle tickets are being sold for a fundraiser. The function a (n) relates the

amount of money raised to the number of tickets sold, n.

It takes as input the number of tickets sold and returns as output the amount

of money raised.

a (n) = 3n - 25

Which equation represents the inverse function n (a), which takes the money

raised as input and returns the number of tickets sold as output?

+2

Answers (1)

Know the Answer?

Judith French · Answer 1

If the function is

A (n) = 4n - 25

and we wish to get the inverse function N (a)

We let

A (n) = a

n = N (a)

Plugging in the values

a = 4 N (a) - 25

Arranging the equation:

4 N (a) = a + 25

N (a) = (a + 25) / 4

The answer is

N (a) = (a + 25) / 4