Final answer:
The correct equation that represents the balance of the savings account in m months is b(m) = $125 + $22m, with m indicating the number of months.
Step-by-step explanation:
The student is being asked to create an equation that represents their savings account balance over time. In this scenario, they start with a balance of $125 and add $22 each month. To express this mathematically, the equation would be b(m) = $125 + $22m, where b stands for the balance and m represents the number of months.
Each month, the same amount ($22) is added to the balance, so this amount is multiplied by the number of months, m. The initial balance of $125 is a fixed amount, so it is added to the product of $22 and m without being multiplied by any variable.