Question

Giselle pays $220 in advance on her account at the athletic club. Each time she uses the club,

$15 is deducted from the account. Write a linear function to model the situation. Define what
each of your variables represents.​

Answer 1

`y=220-15x`

Explanation:

Let x represent the number of times Giselle uses the athletic club and y represent money left in account.

We have been given that each time she uses the club, $15 is deducted from the account. The amount used after using the club after x times would be
`15x`.

We are also told that Giselle pays $220 in advance on her account at the athletic club.

The money left in account after x uses of athletic club would be money in account initially minus amount used for using the club x times.

`y=220-15x`

Therefore, our required equation would be
`y=220-15x`.