The midpoint is (6, 11)
I have attached the equation so it’s easier to understand.
To find the midpoint we do
(x^1+x^2 /2 , y^1+y^2 /2)
3, 7 is x^1, y^1
And
9, 15 is x^2, y^2
(3+9 /2 , 7+15 /2)
Add the x and y =
(12/2 , 22/2)
Now we divide both by 2 =
(6, 11)