| Quadratic Function |
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A Quadratic Function is a type of nonlinear function. 
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Figure 1. |
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Above are two examples of graphs of quadratic functions. These are called Parabolas.
| Minimum |
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The lowest point on the parabola is called the minimum. |
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Figure 2. |
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| Maximum |
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The highest point on the parabola is called the maximum. |
Because of its direction, this parabola doesn't have a maximum.
| Vertex |
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The highest or lowest point on any parabola is also referred to as the vertex. |
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