Question

identify the vertex
(0,0)
(-4,0)
(-1,-9)
(0,-8)

Explanation:

Step1: Recall vertex definition

The vertex of a parabola is its minimum/maximum point, the tip of the curve shown in the diagram.

Step2: Match to options

The diagram's parabola has its tip at the labeled point corresponding to (-1,-9).

Answer:

C. (-1,-9)