What are the rules for dividing signed numbers

Question

I have a question that I really don't get 

Answer 1

The rules are:

1. If the signs of the divisor and dividend are the same (+/+ or -/-), the quotient is positive (examples: 6/3 = 2, -6/(-3) = 2)
2. If the signs of the divisor and dividend are different (+/- or -/+), the answer is negative (examples: -6/3 = -2, 6/(-3) = -2)