Concept
Version 11
Created by Boundless
Graphing Equations
![Graph of $y=-x^2+9$](../../../../../../../../../figures.boundless-cdn.com/34838/full/4vtzswlns6c6i7zlwnkn.jpg)
Graph of $y=-x^2+9$
This graph is of a parabola (a U-shaped open curve symmetric about a line). Parabolas can open up or down, right or left; they also have a maximum or minimum value.
Source
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