All of the above.
Rule: 400 + 25x
After Month 12: 700 dollars
To start, we need to set a variable as the amount of months after you started your savings account. Call this value x. Now, we just have 25x as the amount you gain after x months, so the rule is 400 + 25x. To calculate how much you have after month 12, just plug in 12 to get 400 + 300 = 700 dollars.
The answer is income.
the right answer is wages from your job
we can consider sources of income the salary of your work; because it is money that goes directly to your pocket because it is you who works to earn it.
A rent check that someone else pays for a property and consigns it to your account is not an income for you, because it is an account payable from someone else who uses your account as an intermediary, but this income to your account does not benefit you because It is not yours, therefore you cannot consider it a source of income for you.
You're making a deposit.