Answer:
2 and 3
Explanation:
n.1 isn't right because the numbers are negative so they will b on the left side not the right side
n.2 is right because the numbers are negative and -8.7 is further away from 1 and less than -8.4 so it will be further to the left
n.3 is right because -8.7 is further away from -8.4 making it less than -8.4