The vertex is the highest or lowest point on a graph.
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The important points on the graph of a parabola are the vertex.
the lowest or highest point on the coordinate grid/ graph
The extreme point is called a vertex.
A parabola is NOT a point, it is the whole curve.
When you look at the parabola if it opens downwards then the parabola has a maximum value (because it is the highest point on the graph) if it opens upward then the parabola has a minimum value (because it's the lowest possible point on the graph)
The [global] minimum.