Question

i feel stupid when i need be walk threw to understand it each time in comment

Answer 1

\[x=\frac{ x1+x2 }{ 2 },y=\frac{ y1+y2 }{ 2 }\]

Answer 2

The coordinates of the mid point between N and M,
will have an x value, which is the average of the x values of N and M,
and the y value will be the average of y values of N and M

Answer 3

what surjithayer and UnkleRhaukus are saying is to

add up the x values and divide that sum by 2. This will give you the x coord of the midpoint
you repeat the same for the y values to get the y coord of the midpoint

Answer 4

D?

Answer 5

correct.