Calculus and skateboards

Quote of the day:

Student: “I want to know my speed when I skateboard. What I’ll do is find my average rate of change, because then I’ll know that I had to go that fast at least once during my ride.”

Me: “Nice! Some Mean Value Theorem action going on there.”

Student: “Yes, exactly. Do you see what you’ve created? I hope you’re happy.”

Me: “Delighted.”

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