Answer:
80 points
Explanation:
The credit score increases by 10 points for every $250 paid.
The current balance is $4500; the balance is down to $2500 by the end of the year.
It means a payment of $2000 had been made. ( $4500 - $2500)
$2000 has eight batches of $250 ( $2000/250)
A payment of $250 increase credit score by 10 points
$2000 payment is equivalent to 8 payments.
credit score will increase by 8 x 10 points
=80 points