To calculate the balance of prize money for the contestant, we multiply the number of wrong answers by the amount lost per wrong answer:
Number of wrong answers = 6
Loss per wrong answer = $12.50
Total loss = 6 wrong answers × $12.50/wrong answer = $75.00
Since the contestant has not answered any questions right, his balance of prize money is negative due to the total loss:
Balance = -$75.00
So, the correct response is:
−$75.00 (negative $75.00)