Answer:
sorry but what is this I don't understand?
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)
Answer:

Step-by-step explanation:

Answer:
67.5°
Step-by-step explanation:
180 -45 = 135
135 / 2
k= 67.5