Acar purchased for $18,270 is expected to depreciate according to the formula y= -1260x + 18270 , where y is the value after x years. when will the car no longer have any value?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?