You can identify a parabola graphed on the Coordinate Plane. Then, it is a Quadratic Function.
By definition:
1. If the parabola opens up, the lowest point on the parabola is its vertex.
2. If the parabola opens down, the highest point on the parabola is its vertex.
In this case, you can identify that the vertex of the parabola is:
Then, since thepa