Answer:
The coordinates of point b are (-5,5).
Step-by-step explanation:
Given:
Point a is at (-7,-7) and m is at (-6,-1).
So, to find the coordinates of point b.
Let a (-7,-7) be
, m (-6,-1) and b
.
Now, putting the formula to get the coordinates:

⇒
So, here we will make two equations to find the value of
:

multiplying both sides by 2
⇒
⇒
And, now same method for getting the value of
.

multiplying both sides by 2
⇒
⇒
.
The value of
=
.
Therefore, the coordinates of point b are (-5,5).