A bank's monthly charge for maintaining an account is $.45 for each check written plus a service charge of $12.50. If x represen
ts the number of checks written during the month, which function models this situation? A) f(x) = x + 12.50
B) f(x) = 0.45x -12.50
C) f(x) = 12.50x + 0.45
D) f(x) = 0.45x + 12.50
