Answer:
the mid point formula for this is x+x/2 and y+y/ 2 so #9would be 1/2, 3/2
ANSWER
The vertex is (1,-3)
EXPLANATION
The given parabola has equation:

We group the variables to obtain:

We complete the square to get,



The vertex is of the parabola is (1,-3)
The function is increasing on the intervals
x ∈ (-∞, -1) ∪ (1, ∞)