9. Find the midpoint of the segment having endpoints (4.1,−6.6) and (6.6,−4.1).

Answer: [tex]\displaystyle (5.35, -5.35)[/tex]
Step-by-step explanation:
We will use the midpoint formula. See attached or view below.
What does this formula do? We are, essentially, finding the average for the x-values and y-values.
[tex]\displaystyle (\frac{x_{1}+x_{2} }{2}, \frac{y_{1}+y_{2} }{2} )[/tex]
[tex]\displaystyle (\frac{4.1+6.6}{2}, \frac{-6.6+-4.1}{2} )[/tex]
[tex]\displaystyle (\frac{10.7}{2}, \frac{-10.7}{2} )[/tex]
[tex]\displaystyle (5.35, -5.35)[/tex]