What information is recorded in the sign of the derivative? - Week 3 - Lecture 6 - Mooculus

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Now I know why you say out "S-I-G-N". If you didn't, we would think you meaned the trigonometric sin(x) function.

BTW: Another example of that fact: If you drive a car in positive speed, you drive forward. If the speed is negative, you drive backwards.

martinnolin