Inflection Points and Concavity Intuition

Understanding concave upwards and downwards portions of graphs and the relation to the derivative. Inflection point intuition

[chrishanni]

Nobel Prize! This guys teaching style should be studied and taught to other teachers. Very effective, thank you!

[toad]

I SEE THE LIGHT
thank u khan academy
god bless

[Flankymanga]

This is the best stuff about mathematics i have ever saw. Sal you are a true teacher of nations just as Comenius.

[sque]

You are the best. You explained so important points that aren't even mentioned in my textbook!!!

[khanacademy]

You're correct. I made an annotation to reflect this.

[droopnon]

10 years and Khan academy is the best, thank you

[DanicaMarieMusic]

7:01 "Concave upwards is like a 'U', concave downwards is like uh...uh, I guess uh, uh, uh... An upside down 'U'!" Haha...

Thank you so much for the great videos!

[Lyxtwa]

This is a very good explanation of the intuition of the 2nd derivative test. Thank you

[leysergio]

Very useful to see all of this information integrated visually. Thank you

[ultimazer]

Two dislikes? Really? Sal teaches better than most math instructors I've come across, and there are actually people who dislike this?

[michaelflanagan]

concativity isn't a word...just saying...

[angies]

I can't thank you enough man. Hope someday I have enough money to support your work and pay you back for everything you've done

[ammarkhan]

May Allah give him the best reward. Ameen !!

[erinaerina]

I am not just math but also English from you as I listen. Then, of course, teaching skills and conversation skills 🤣
Thank you

[Shine]

Concave up - like a cup
Concave down - like a crown

[salarliv]

concave up - like a smirk
concave down - like a frown

[mokshkopikar]

Thank you so much I've been trying to understand this for so long and this was so freaking helpful god bless you

[nakulchauhan]

Very useful video... Nice work... Your channel focus on basics... Very nice...👍👍

[baijalabhishek]

Great choice of colors and presentation!!

[jorisvandeBrande]

Concave upwards - (Thumb up) - the U shape (glass) can be filled with beer
increasing slope (fun)
Concave downwards - (Thumb down) - the U shape (glass) cannot be filled with beer
decreasing slope (fun)