Calculus for three-year-olds

This is what my CliffsNotes AP Calculus review guide says:

“If a graph is ‘smiling’ at you, it is concave up; if it is ‘frowning’ at you, it is concave down.”

What an incredible academic subject. Calculus is great–the graphs have feelings!!

It comforts me that even when calculus is sad and I’m frowning at my concave-up graph, it still smiles at me.

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2 thoughts on “Calculus for three-year-olds

  1. Our pre-cal teacher teaches us that positively-powered polynomials never change their behavior and negs do.

    Here’s what I mean:

    y=x^4 starts in what my teacher calls “heaven” and even though he may do bad things during his life, he’ll go back to “heaven” when he dies.

    She actually uses heaven and hell to teach us what graphs do.

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