If your math teacher told you that mathematics is everywhere, believe him. Almost all the things that we see around (even things that we do not see) are related to mathematics – even potato chips. Yes, even potato chips.
Some potato chips, particularly Pringles (I hope they give me 500 bucks for this), are in a shape of a saddle. In mathematics a saddle-shaped graph is called a hyperbolic paraboloid (see left figure).
A hyperbolic paraboloid quadratic and doubly ruled surface given by the Cartesian equation 
For now, let’s be happy that we know that even potato chips can be modeled by graphs. 
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Sources: Omg Facts, Pringle’s Site, Wolfram Math World
Photo Credit: Hyperbolic Paraboloid (Wikimedia), Pringles chips (Wikimedia)
