To solve the division \( -18.42 \div -1.2 \):
- When dividing two negative numbers, the result is positive.
- So, we need to calculate \( 18.42 \div 1.2 \).
Now, let's do the division:
\[ 18.42 \div 1.2 = 15.35 \]
Thus, the quotient of \( -18.42 \div -1.2 \) is \( 15.35 \).
The correct answer is 15.35.