I think you just have to add all of the totals up??
For this case we have the following equation:

Deriving we have:

We match zero:

We clear the value of x:

Then, we substitute the value of x in the equation of the parabola:

Thus, the vertex of the parabola is the ordered pair:
Answer:
The vertice is:
Answer:
D
Step-by-step explanation:
Answer:it is linear because every time x increases 1, y increases by 2.
Step-by-step explanation:it is a linear relationship and it is changing at a constant rate