Direct and inverse variation | Rational expressions | Algebra II | Khan Academy
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- čas přidán 12. 04. 2011
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Understanding direct and inverse variation
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I am always so sleepy in math class, I guess CZcams is my night school now
Same here XD
This is soo me fam
Doki dokii literature
Sameeee ah
Same to you
These videos sum up my teacher's 1 hour math lesson in under 10 minutes and I actually understand it. I literally just daydream in math class; watch one of these videos, ace the homework and test.
For real, people are always so confused on how I’m able to just draw and talk and have one of the highest grades in the class. For some reason I learn way better one on one.
@@beastboy6799 same for me.
teachers could just stream this for the lesson
THIS
@@matthewmccabe3411 my old teacher probably saw this comment and took it a bit too seriously
How does he write so good with a mouse
Jakob Zilinski I have no idea
A PC isn't limited to a mouse pointer you know...
I mean, this is probably his 1000th time using doing this so yeah XD
he is using a stylus on a drawing tablet
It is not a mouse. there is a special board that he is writing on and everything he writes is being displayed on the screen.
This honestly helped so much... my teacher pretty much just makes up whatever she wants in her head and assumes we'll grasp on to it, and that makes it so hard to understand, so thank you.
I f@cking hate school
@@worldstarrap5127 lol
r u still alive
my teacher explains so fast and when the two top students understand she moves on like there aren’t any other students who still don’t get it
@@err0r518right
the only reason I'm here is because mY tEaChEr CaN't TeAcH tHrOuGh OnLiNe ScHoOlInG!!!!
I agree online teaching is more like an epidemic to students more dangerous for us. XD
@@eliteessence831 agreed no more my fwend
@@x3y3z3k mhm ur right
couldnt agree more
true
I'm about to retake my mathematics examination in about 4 days. I barely had a clue about variations because all I did was daydream in math class and give up on any variation question because I didn't understand my Teacher no matter how much he tried to explain. All of this sums up a 45minute math class. Thanks to Khan Academy now I perfectly understand Variations and don't think I'll be going anywhere else when I have trouble with math.
Africa,Tanzania
Pliz help i think i am really dumb im failing to understand e story sums like ey the one i don't get is very simple
If 1meter of wire has a mass of xgrams what will be the mass of 25m of the same wire??
@@cococandy3820 25 x
@@lucastang8273 a bit late
I LOVE how he changes colors every two seconds!
I'LL DO IT IN MAGENTA
NO, SEA GREEN!
ALL OF YOUR OPINIONS ARE INVALID, THE CORRECT CHOICE IS A BLINDING BANANA YELLOW TO PROPERLY CONTRAST WITH THE BLACK BACKGROUND
69 likes, perfect
@@larissal2592 i like your name and profile picture lol
I'm getting ready to fail my maths test 😭😂
same
how was ur test?
@@census467 how was your test
@@Josh-gi3bi it went well!
Same lol
Imagine having Sal as your math teacher. I'd learn the whole textbook in 2 days
Finals sent me here.
I'm still so confused... This is the first math concept I haven't gotten
Madeline Daunt same :(
Madeline Daunt SAAAAME!! I've tried everything! I just can't understand this no matter how simplified it is explained :|
same here......and am really tired of failing this topic......i need help
SAME HERE! :'v
Madeline Daunt 😐😐 wow do u do core math or something
"It's a different kind of green but serves a purpose." LOL. His voice was even more serious at that time. :D
Finally something I understand. Thank you very much it helps many youngsters like me
bro taught a lesson in 10 mins that my teacher could explain in 50 🫡
Your voice...its perfect...
Jayo Caine ummm. . Okay
fOcUs
Um
thank you so much! this saved me from getting an awful grade in math! SAL KHAN IS AN AMAZING HUMAN BEING!!!
Love this guy real helpful. A whole lot better than my teacher
You are doing wonders to help my grade, thank you much sir
I finally understand, perfect timing for finals. Thankyou👌🏽
it feels alone commenting in 2020
u arent alone pal
@@syedzoran7453 hm monke
Oh my goodness, thank you so much for explaining this.
Quite helpful, saving my maths and physics marks.
Who wants to build a time machine and stop maths from being invented
Reply to show ur in
Ig
Thx so much we finished early last year so we covered this before summer and now we're expected to know this still even though we haven't reviewed it.
Thanks a lot. I was in a meeting with my teacher discussing about for 2 hours and I did not even understand. After I watched the 10 video I totally understood it.
Honestly it's great, i was not understanding a part of speck of dust. Because of this video, i understood on just within ¾ video. Then i solved the question directly related to it in just 2 minutes!!
Thank you, Sal, you make math make sense!
may i ask how did you know his name?
@@wnks.m3119 Sal is the owner of Khan academy
Thank you for this explanation!! I easily understand this now 😊
I didn't understand what my math teacher said. But thanks to this video I got it. Now I know how to do inverse variation and direct variation. Thanks.
I'm learning this in algebra I
Algebra II now
same!!!
Thankyou so much! Now i can give more further explanation in my report about inverse variation
I had so much trouble with this, you explained it perfectly
really thank you
.
negative case was confusing me .. but know I understood it
Thank you so much! I didn't want to turn in the assignment because I didn't understand it but this helped me so I learned how!
THANK THE LORD FOR KHAN ACADEMY. my teacher went way too fast when she was explaining. LIFE SAVER
I swear, I want to meet this guy's students.
why does this video explain direct variation and inverse variation better then my math teacher
This man does a better job at explaining math then my math teacher
i love his voice
Thank you Khan, dude this helped a lot.
such a great way to get the answer
Was sick the day this was taught. Thanks for the explanation!
I'm in math class😫😫
This is really helpful u explain it waayyyyy better than my math teacher:)
I learn better watching yt vids then online school(quarantine school made me learn different now😂)
Thank you so much :D i learned better here than at school
Great overview!
Curiosity got me here. Thanks for answering my inner doubt! 😊
You must be a nerd if you came here for CURIOSITY???
I HAVE FINALS THAT'S WHY I CAME HERE
@@teknovfx7037 good luck also mind explaining it a bit more for me im confused
@@teknovfx7037 yes, I have finals tomorrow, and I dont think I would ever come here out of pure curiosity
What a great explanation
Math test tomorrow needed this
for my notes:
- direct : 1:45
- inverse : 6:47
Yo these Khan Academy videos are coming in clutch
Swear to god man, I wish u were my teacher.
Good. I wish this was school for 10 min and go home
How is this man’a color choice so aesthetically pleasing?
It's really helpful
Now I get variation and how it's done! How could i ever thank you!
Oh yeah yeah
it really helpful
it really help to my mastery test later :D
Thank you so much!!! This really heed me considering I have a test tomorrow!
I have a test tomorrow as well_
@@census467you wrote that 7 years later
thank you!!!!! ............. just one question , how do you right so perfectly with a mouse
i know right
thank you so much sir.
awesome
This was uploaded on my birthday 🤍🤍
Not everyone complaining about their teachers😂😂😂
This guy is AMAZING
Really helped me for my math report tomorrow. Keep up the good work!
I am always so sleepy in math class, i guess you tube in my night school now 😊😊😊😊
nice explination
thank you khan,,
This topic is extremely simple to me. This video has done an excellent job summarizing my 2 hour algebra II labs.
The formula for direct variation can also be x/y = k and for inverse can also be written as xy = k, right?
1:20
Is equal to *pIE*
Hey um its my first time to join the math quiz bee and im here trying to understand this lesson :)
Thank you sir
And here i was pulling my hair out because i couldn't understand while there was a whole video on youtube.
New logos yay!
been out of HS (80--18 years,) Failed my first try at calculus
thought I'd brush up before taking the plunge
darn there is a lot of stuff I have forgotten,,
thank u sir
this helps
I love this guy he is a god
Tq this so helpful
What a bunch of Alice in Wonderland bullshit, I swear they make this shit up as they go along.
How is it bullshit? xD everything he said was spot on.
I think he/she means math itself is bs
MountainFox51 totally agree with you
I finish math I finish the semester yay
ah yes, the stuffy 2011 mic. ya love to hear it
DUDE...THANK YOU SO FUCKING MUCH, YOU JUST SAVED MY LIFE
I slept since I'm in high school we have so much homeworks and projects I was watching this 11:38
Wait, for the first rational function looked over it is very clearly a direct variation, as x approaches 0 y approaches infinity. He went down with x so of course it's going to go in the opposite direction.
You teach well 🙂
thank you !!
Im confused, so when you do a direct variation you must multiply it with two while in inverse you divide it then multiply?
EXCELLENT, YOU SAVED MY DAY!
i hope you know that this video is a life saver
still confused
Eva Anita im laughing so hard idk why😂😂😂😂
😂😂😂😂😂😂
Helped*
Pls write bit bigger
By the way nice explanation
Well done
tysm
this guy knows his stuff