Question

look at this graph: what are the coordinates of the vertex?

Explanation:

Step1: Identify vertex on graph

The vertex of a parabola is the lowest (or highest) point. In this graph, the parabola opens upwards and the lowest - point is on the y - axis.

Step2: Determine x - coordinate

The x - value of the vertex of a parabola symmetric about the y - axis is 0.

Step3: Determine y - coordinate

By looking at the graph, the y - value of the vertex is - 4.

Answer:

(0, - 4)