ashley92193 mowi:

Feb 22, 2012 - thank you so much! I've been studying this for hours from the textbook and you taught me everything in 15 minutes lol. thanks! =D

patrickJMT mowi:

Feb 22, 2012 - no problem, come back any time :)

quantumXphysikz mowi:

Feb 23, 2012 - Please replace my teacher! You are wonderful!

MrUnladenswallow mowi:

Feb 25, 2012 - thanks this was a great help!

jesualdo2000 mowi:

Mar 1, 2012 - you are the men thanks

JmacSens mowi:

Mar 5, 2012 - thank you so much!

kiwiblueyes mowi:

Mar 7, 2012 - You helped me SO MUCH! I understand it now!!!!! Your wonderful!!!!!

iPlode mowi:

Mar 13, 2012 - How do you get the derivative of (x-a)^n (If a and n represent two given numbers)? Nice videos btw.

sai12143 mowi:

Mar 15, 2012 - how about for partial derivatives? :(

Lynaar8 mowi:

Mar 20, 2012 - Your the d best! 

asspounderify mowi:

Mar 25, 2012 - THIS MAN IS A FUKING GENIUS

asspounderify mowi:

Mar 25, 2012 - sorry for comenting twice. but that second grpah blew my fuking mind.... thats kinda how it would have went down on my calc test trm... i would have failed that. thanks Patrick. :D

bradyespey mowi:

Apr 16, 2012 - You apologize too much for your "horrible" graphs and what it would be like if you actually drew things right. Stop worrying, your graphs are fine. It makes me rethink everything when you say that it's not actually right because you can't draw. Just say "let's imagine this slope is -5" and move on.

ALOTAIBI6464 mowi:

Apr 16, 2012 - You're awesome

dwk1987 mowi:

Apr 23, 2012 - I am still clueless

supratik2626 mowi:

Apr 24, 2012 - awesome 

rocolax mowi:

Apr 25, 2012 - thank you thank you thank you! ur videos are awesome

honey123401 mowi:

Apr 28, 2012 - THANK YOU SO MUCH... Again how do I sketch graph when I am given points lets say f(1)=2 .f'(1)=0 and f(3)=-2 and f'(3)=0 .. ??

Muckanator mowi:

May 1, 2012 - Very Handy, thanks :D

rahrahritaa mowi:

May 8, 2012 - calc final in 2 hours! this is a great review

riserva22 mowi:

May 9, 2012 - Why does he keep on repeating "To me it looks more positive"... Is that his opinion or a fact?

DSKiller619 mowi:

May 10, 2012 - Well, it's not his opinion; it is more of an assumption because you have to assume the slopes relative to each x-values. However, his "assumption" is correct because it's clearly visible when the slopes become more positive and negative. You'll have to assume when you're graphing as well.

fireshade24 mowi:

May 14, 2012 - fact

xxpunkxxgirl mowi:

May 15, 2012 - Awesome!! We're doing this in calc now, and you taught me better in 15 mins than my teacher did in a whole week.