We have already drawn the most basic form of quadratic function which is
in the post https://mathinstructor.net/2018/07/quadratic-functions-pre-calculus-grade-11-post-2/. What is the vertex of such a quadratic function?
Vertex of the quadratic function is the lowest point present on the graph if direction of opening is upwards. Vertex of quadratic function is the highest point present on the graph if direction of opening is downwards for the given quadratic function. In an example, when we draw shape of
. Direction of opening for this graph is upwards. What is the lowest point present on this graph? The lowest point present on this graph is
which is the vertex of the quadratic function
.
If we draw graph of quadratic function
, we get something like
The direction of opening of the graph is downwards. The highest point present on the graph is
which is the vertex of the graph.
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