Identify the vertex of the graph. Tell whether it is a minimum or maximum.

The vertext is a maximum with a coordinate of (0, -1)

(0, - 1) maximum

Step-by-step explanation:

The vertex is the turning point of the graph.

That is vertex = (0, - 1 )

Since the graph opens down then it is a maximum

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yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value