Answer:
1. Negative 4
2. Negative 2
Explanation:
1. Opposite of positive 4 is negative 4.
Negative 4 will be below sea level, so on the number line it will be below the zero, on -4.
2. Negative 2
Negative 2 will be below sea level, so on the number line it will be below the zero, on -2.
I hope it makes sense.