Question

what is the vertex? (-1,-3) (3,1) (1,-3) (-1,-1)

Explanation:

Step1: Identify vertex on graph

The vertex is the lowest (or highest for a downward - opening parabola) point of a parabola. By observing the graph, we find the lowest point.

Step2: Read coordinates

The x - coordinate and y - coordinate of the lowest point are 1 and - 3 respectively.

Answer:

C. (1,-3)