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The cables upon the golden gate bridge create a parabola!  It has a minimum and I have no idea what the vertex would be.. Maybe (0,0)?

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Gateway Arch in St. Louis.
Maximum (3,4)

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This banana has a minimum, the vertex is (0,0)

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The maximum of the water fountain is (2,3) and is also its vertex.

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This roller coaster creates a parabola. This parabola has a maximum of (2,0). The vertex of this parabola is also (2,0).

[Photograph]. (n.d.). Betsy M’s TES Math Blog: Real World Parabolas. Retrieved from http://betsymmath.blogspot.com/2012/05/real-world-parabolas.html

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Heaters use Parabolas to reflect heatwaves to concentrate on a single object or area. The curve reflects waves in a way to control the way tha the move once hitting the surface.

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The vertex of my dresser handle seems to be about (0,-2) according to the desmos overlay. This also seems to be the minimum.

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The parabola of the McDonald's sign opens downwards, the vertex of the sign is (2,7), this is also it's maximum.