You withdraw ​$15 from a bank account once per day for four days. What integer expresses the change in value of your bank​ account?

To calculate the change in value of your bank account, we need to consider the withdrawals.

Since you withdrew $15 once per day for four days, the total amount withdrawn can be calculated by multiplying the withdrawal amount by the number of days:

Total amount withdrawn = $15 x 4 = $60

Since you withdrew money, the change in value of your bank account would be negative. Therefore, the integer that expresses the change in value of your bank account would be -$60.

The change in value of your bank account can be expressed as -$15.