Can you like show a picture because I don’t understand what you tryna ask
The y intercept will be 5
Answer:
Midpoint is
Step-by-step explanation:
A line segment refers to line that has two endpoints.
Let
be the endpoints of a line segment.
Midpoint of the line segment is given by 
Take the given points as follows:

Midpoint of a line segment 

Answer:
162 [m²].
Step-by-step explanation:
required surface is:
A=(3*7+6*7+3*6)*2=162 [m²].