Write about a real world situation that fits the following linear function: y=-20x+220

Be sure to include what all four parts in your story. (What part represents what)

If a person have 220 $ and he spends 20 $ every day in how many days he will have 0 dollars left.

instead of y we would put 0

0 = - 20x + 220

-220 = - 20x

we divide both sides by - 20

11 = x

after 11 days that person will have 0 $ left