Iteration of Rational Functions (unam.mx)

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Iteration of Rational Functions (unam.mx)
This is a Jamboard Activity I drafted for my math seminar students to explore the Four Color Theorem through Kempe’s (incomplete) approach offered in 1879. Essentially, it gets students thinking about the maximum degree of a vertex in a planar graph.You are welcome to copy and edit with love (a la Desmos) or share another resource, if you have something you like better!