To find the equation that represents your balance \( b \) in \( m \) months, we start with the initial balance of $125 and add $22 for each month.
The correct equation is:
\[ b(m) = 125 + 22m \]
So, the equation among your options that shows your balance \( b \) in \( m \) months is:
\[ b(m) = 125 + 22m \]
This means that for each month \( m \), you are adding $22 to your initial balance of $125.