Jamie’s parents gave him some money at the start of the school year to spend on supplies throughout the year. He spends $15 at the start of each month on paper, pens, and other supplies. The equation of the line is given below, where A is the amount of money remaining in his bank account and m is the number of months. Determine the number of months it will take Jamie to run out of money.
A(m) = -15m + 105