does this formula in blue make sense?
Do you understand how to find midpoint?

Answer:
yes it makes since and the midpoint is the middle value between the two points.
Step-by-step explanation:
example
point 1 (2,3)
point 2 (6, -1)
midpoint
(2+6)/2 for x
(3+(-1))/2 for y
x = 8/2 = 4
y = 2/2= 1
so midpoint on line between 2 points is (4, 1)