I think that the interval that is always increasing is interval number 1.
Suggestion: Please show the problem for the questions, or I'm afraid I can't help!
Answer:
Midpoint of a segment in the complex plane with endpoints at 6 -2i and -4 + 6i is:
1+2i
Step-by-step explanation:
The midpoint of a segment in the complex plane with endpoints at 6 -2i and -4 + 6i is:

Hence, midpoint of a segment in the complex plane with endpoints at 6 -2i and -4 + 6i is:
1+2i
Maybe 2/2 I’m not sure. Sorry if it’s wrong.