@@Al-xi8vu You are right. It's true because math ruins our life. So math is just evil to us.
@dhruvshahane2059
9 жыл бұрын
There is an error present in the video. When writing out the second inequality, the y-intercept is wrong and therefore, it should be 3/2.
@caitlinfichtler6155
2 жыл бұрын
checking the comments to make sure I wasn't crazy. Thanks!
@ryanli9310
2 жыл бұрын
I think i was wrong or i miss any steps! Thanks for checking
@cat-des650
3 ай бұрын
thank u
@EijiSalvador
9 жыл бұрын
At 3:40 why does 6/4 = 6?
@matthewherzeca3251
8 жыл бұрын
The y intercept can't be a fraction
@matthewherzeca3251
8 жыл бұрын
***** or decimal. If have something that can't divide into a perfect number (like 3) than don't divide it.
@ginkomushi7950
8 жыл бұрын
+Clorox Bleach that's not how it works
@ourworldclaim513
7 жыл бұрын
It's an error
@kelseyl.4381
6 жыл бұрын
The y-intercept can be a fraction.
@mitchreed6630
5 жыл бұрын
it’s funny how this video explains more than my algebra teacher
@Kit-ie5oc
3 жыл бұрын
Ikr
@ew3863
3 жыл бұрын
fr
@rachelarnold4632
2 жыл бұрын
In less time too lol
@Syydontmiss
Жыл бұрын
Crazy how you are either a senior or done with high school now
@mitchreed6630
Жыл бұрын
@@Syydontmiss senior 😭😭😭
@damarisbishop6960
8 жыл бұрын
sorry if this sounds like a dumb question but how do you get 6/4 to equal 6? ahhh i see I' am not the only one asking this question
@matthewherzeca3251
8 жыл бұрын
The y intercept can't be a fraction
@dancekinghoseok4608
6 жыл бұрын
he did a mistake
@thinellejohn237
5 жыл бұрын
I was thinking the same thing, like what?
@cassandrafitydjx7462
4 жыл бұрын
@@matthewherzeca3251 it can be fraction
@shreebatsachaturvedi5376
4 жыл бұрын
@@matthewherzeca3251 i mean, you really shouldn't answer a question, you have no idea about. you're going all over the place, saying it can't be a fraction. Dude, take any graphing software, and plugin a y = mx + c, where c is a fraction, and no, your house doesn't blow up! It works!
@thatwasmyfault7350
6 жыл бұрын
Math makes me feel stupid 😂
@sukarnos3xy
2 жыл бұрын
It's normal for me to feel "stupid" when i watch maths everyday, just like how it feels when you adapt to something uncomfortable.
@wonderthegoat
2 жыл бұрын
@@sukarnos3xy u had to ruin it didn't you?
@sukarnos3xy
2 жыл бұрын
@@wonderthegoat Sorry, no debates please.
@wonderthegoat
2 жыл бұрын
@@sukarnos3xy ez win
@jenniferangeles04
6 жыл бұрын
I showed this video in class and we found an error. The part when you divided the second equation by 4. You forgot to divide 6 by 4. I had to correct it in class and explain it to my students. On the brighter side of this experience, I realized that my students understand the lesson because they easily identified the error in the video, which means they dont just watch it but they are really paying attention to the process.
@masalagravy6061
3 жыл бұрын
In that case, he totally did it on purpose
@enxvity
4 ай бұрын
@@masalagravy6061 LOL
@davidpham3787
8 жыл бұрын
learned more in this video than my teacher teached me
@arlettebravo5449
8 жыл бұрын
Same
@ehhserkumoo1734
7 жыл бұрын
David Pham same haha
@kristopherwicker4417
6 жыл бұрын
Same
@ammonitetheseaserpent3761
6 жыл бұрын
*Taught
@ammonitetheseaserpent3761
6 жыл бұрын
Sorry, I had to. :P
@blainevideos
8 жыл бұрын
When simplifying the second inequality, you accidentally lost the denominator in 6/4. It can't just disappear. What you wanted to do was to keep 6/4 and then simplify it to 3/2 (or 1½). Thus the reference line should have started with the y-intercept of 3/2 (1½) and then had a slope of -1/4 from there. And to Matthew Herzeca, you absolutely *can* have an intercept that is a fraction.
@shreebatsachaturvedi5376
4 жыл бұрын
yeah, that guy's going around driving people bonkers!
@puertodeluna
9 жыл бұрын
I was glad to see that others noticed the error in the y-intercept. I'm a teacher too and it is common to make errors while writing on the white board. I rely on my students to help me out and point out my mistakes.
@hey_its_mika
8 жыл бұрын
hey guys on who are watching this on sunday
@peterking2561
6 жыл бұрын
i have finals tomorrow
@lzyyxe
4 жыл бұрын
Hah me
@khakipeach2128
3 жыл бұрын
i’m watching this on saturday
@era2s
3 жыл бұрын
oh hey wassup
@hey_its_mika
3 жыл бұрын
@@era2s lmao I made this comment 4 years ago, glad to see people still chugging on the math train
@kate2799
7 жыл бұрын
im taking two highschool classes early while doing 8th grade at the same time and my math eoc is next week. this helped so much!
@lukealucard
8 жыл бұрын
Thank you so much. Also I think you made a mistake solving the second inequality. The y- intercept is equal to 6/4.
@jessicatenezaca3786
6 жыл бұрын
What if you have an equation that has the y intercept bigger than the graph. For example if I have x+y is less or equal to 200 and 5x+6y is greater or equal to 500. Even if I put the equation in y=mx+b form, the y intercept is still big so how do I graph that on a graph that just the y axis goes up til 10 and how do I graph the slope?
@twary1911
8 жыл бұрын
WOW thank you the shading part our teacher taught us was so fucking confusing, you just saved my life
@nigeriawilliams972
3 жыл бұрын
no reason for the lauguage my love 🥰
@heyemilywalker
8 жыл бұрын
watching this on sunday at 11pm because test is Monday morning at 7:30
@indi-go1868
7 жыл бұрын
Did you do well?
@heyemilywalker
7 жыл бұрын
hell nah
@sawmaniac12
7 жыл бұрын
Emily Walker Thursday 3am ; test is Thursday 7:45 😂
@heyemilywalker
7 жыл бұрын
haha!
@jaclynyarbrough3735
7 жыл бұрын
My teacher says it is rise over run
@nightsky2949
6 жыл бұрын
I suggest using the rise over run term when graphing, it helps you remember
@oscarruiz1140
7 жыл бұрын
what program do you guys use to do the equation?
@spxncxrtxrry
11 жыл бұрын
Thanks man you are better than any teacher I have ever had
@popmuzic71
9 жыл бұрын
....I like the purple. And the fact this is saving my grade.
@shine8704
2 ай бұрын
I understood this better than what my teacher was teaching for 2 weeks. Thank you
@24DaniS24
Жыл бұрын
In the second example, why is the y intercept 6, instead of 6/4 or 3/2? Both sides had to be divided by four, so that should make 6 become 6 over 4, right?
@user-gz6ji9hy1y
6 жыл бұрын
Thank You! This was very helpful and I got to finish my math homework! I Liked and Subscribed.
@jisabinu
8 жыл бұрын
Is the 1/4 taken in the second inequality common??
@Engineer91210
5 жыл бұрын
why would u ever dislike mr khan????? 58 dislikes????? why????? he's doing great
@angelvides2310
7 жыл бұрын
Omfg thx my test is tmrw and this was super helpfull
@brianwang4324
10 жыл бұрын
OOMG THANK YOU SOOO MUCH U JUST PROBABLY HELPED ME PASS MY GRADE
@mikichu1144
3 жыл бұрын
Wow thank u so much, I've learned more than what my teacher thought me👀
@ahmedalgammal3055
9 жыл бұрын
Ur the best khan academy thank you so much
@123WobWob
11 жыл бұрын
At 1:33 why does -2/3 magically turn into positive 2/3.
@marisleong8725
4 жыл бұрын
u probably don't care anymore but it was -2/-3 so the negatives cancel out
@Bowyerlegend
2 жыл бұрын
I think this man just saved my future
@jada004
10 жыл бұрын
OHHHHHHHHHHHHHH MYYYYYYYYYYYYYYYY GOOOOOOOOOOOOOOOOD thank you.!! You are the god of Algebra.!!!!!!
@happyface958
6 жыл бұрын
Guys 6/4 is 6. Is this a new theorem or postulate?
@HumanReject
9 жыл бұрын
Khan academy never let's me down lol I'm about to get a good grade on my test now
@ottoharcrow9327
6 жыл бұрын
This was a huge help! Thank you! By the way, Sal Khan made a simple error and we all know what the real answer is and how to do it so stop complaining.
@jekinboy1997
12 жыл бұрын
thx bro dizz will really help for my test bm3 benchmark 3 for algebra
@Msmabintistar
5 жыл бұрын
Why wasn’t the y-int 6/4?
@isaacjibben385
4 жыл бұрын
Best Teacher ever!
@someguy3348
9 жыл бұрын
why dont you devide y intercept (6) by 4 as well
@bdhaan9146
Жыл бұрын
Does the inequalities sign change when dividing by a positive number?
@reivax6368
Жыл бұрын
just negative
@RizaldoMullings
10 жыл бұрын
Thank you. You must be an algebra god.
@jxfar
10 жыл бұрын
@Brian Wang ME TOO! Thanks a lot Khan Academy.
@happyface958
6 жыл бұрын
I love how he didn't realize . That's me honestly.
@awesomeg7284
9 жыл бұрын
Hey ! I have a question. Why do we need to graph this inequality thingie in the first place?
@kevinhuynh4533
8 жыл бұрын
Wouldn't that get really messy?
@kayleewilson6397
4 жыл бұрын
i wonder what sal is doing 9 years after he made this video
@garbageman1032
Жыл бұрын
I love math but this made me want to throw hands I appreciate you so much for helping me understand this it’s fun now my teacher is doo doo water
@goldenstarfish7496
9 жыл бұрын
why the color orange equation swaped?
@ismaelescobedo444
8 жыл бұрын
Thank you so much!!!!!
@SVKteacher
12 жыл бұрын
To all students, yes the y-intercept should be 6/4 (reduced to 3/2 or 1.5) for the second inequality. Other than that, his process is totally right.
@jewelss7191
8 жыл бұрын
When you do the second equation you divide both sides by 4 and there is 6/4 and you say it is just 6 when you move on. Is this an error or is there a reason why you did this?
@nourn2002
6 жыл бұрын
didnt switch the sign after division
@AGIRLSVIOCE
8 жыл бұрын
Thank you!
@gabrielagomes1510
11 ай бұрын
What is the value of x y? The solution?
@HanMing1
8 жыл бұрын
6/4 = 6 pplz fix
@ourworldclaim513
7 жыл бұрын
Han Ming yup I was saying that too
@Al-xi8vu
6 жыл бұрын
6/4 = 6 Quick mafs
@serapanda3038
Жыл бұрын
thank you i found this helpful
@lousybil5235
6 жыл бұрын
"When you run 3, you go up 2" what if it's not a fraction? For example: y > 4x - 7... do we run 4 and go up 1?
@princeosei7362
6 жыл бұрын
Short Answer: You go up 4 and over (to the right) 1. (Explanation below) _________________________________________ Explanation: I personally prefer using rise over run, which is the same method he used, but he just flipped it (run over rise), which is more confusing to people who don’t know how to do it. So in your situation you can turn the slope (rate of change), which is 4, into 4/1, since 4/1 still = 4. So then when graphing you would start at -7 on the y-axis AKA (0,-7), and rise (go up) 4 and over (right) 1 and repeat. Once you run out of room on the graph, unless you want to just use a ruler to draw your line, which is less accurate, you go back to the starting point (0,-7), using the slope, and go in reverse. Since -4/-1 also = 4, then you can start at (0,-7) and go down 4 and over (to the left) 1 and repeat. Also, in the situation, when connecting the points, if your line is going downwards from the left to the right of the graph (negative/decreasing), then it’s wrong. Because 4 is a positive (increasing) number so your line should go up from the left to the right of the graph, because it’s increasing. However, you can’t use -4/1 or 4/-1 as they both = -4 instead of 4. So using -4 as the slope would make your line negative/decreasing and make your graph incorrect.
@happyface958
6 жыл бұрын
It's going to e 4/1
@chessstar2617
6 жыл бұрын
Ur a blessing cause my teacher sucks at explaining
@marielalfonso5083
11 жыл бұрын
Thank you! :))
@letsgetdowntobusiness-
10 ай бұрын
I'm a learned Doctor and I didn't catch the error. Its funny how many teachers are watching this video.
@sdlgnpcc
11 жыл бұрын
Wait shouldn't the solution set for all three line to from 0 to -n? Where n is a constant pls I am confused:/
@kamsioguegbu3902
2 жыл бұрын
Thank you Khan Academy.
@williegray5586
7 жыл бұрын
thanks homie
@marlenebaugh8078
Жыл бұрын
Why didn't you divide 6 by 4 for they intercept?
@cat-des650
3 ай бұрын
1:31 the point , this instantanous rate of change just illustrated how hournadous my maths is.😢😢
@daviddunson5181
6 жыл бұрын
Best part at 8:51 This is how I study everynight
@rezaarian237
6 жыл бұрын
6/4 ??? who you can get 6/4 in the second one?
@masalagravy6061
3 жыл бұрын
3:41 shouldn't 6/4 be 3/2, not 6? lol
@sabrinasykes5480
5 жыл бұрын
I get anxious by only watching this
@rosepierce9382
Жыл бұрын
How do we solve a system of linear inequalities algebraically?
@maxcolburn8323
Жыл бұрын
With systems of equations there is one set answer, but with inequalities there is not one set answer. From my knowledge the only way you can is from using sub. to plug in points for the x and y. Example y>1x+2; y1(3)+2 and the same for other inequalities. You check and see if it’s a true statement
@rosepierce9382
Жыл бұрын
@@maxcolburn8323 Thank you!
@myazan1095
3 жыл бұрын
3 : 55 you subtract -x only x. why you didnt subtact that other number also i meam 4y
@jazzybenignohall
11 жыл бұрын
Why is it 6 shouldn't it be 3/2
@judahkass7592
7 жыл бұрын
My biggest problem is when the y-intercept is a fraction. That always pisses me off
@suzerain_k
5 жыл бұрын
can anyone explain to me how -2/-3 x becomes positive??? just wondering..
@dbolt_
5 жыл бұрын
they are both negatives so when you divide or multiply them the negatives cancel out
@earlystrings1
6 жыл бұрын
Error at 3:40. 6/4 not 6. But you still get the idea. The y intercept would be lower but same slope.
@KeilaRemon2006
9 жыл бұрын
He decided to make it happen. If he should have divided 6 by 4 the result would be 1.5 or round off 2. But maybe the y should have been between the 1 and 2. Then solve the slope.
@Javtube94
11 жыл бұрын
@Quanami: 6/4= 3/2, yea he messed up alrite lol
@jamesbooher9604
11 жыл бұрын
subtract x from the right side, and the left side, making the problem look like x-y
@jennieb.9779
8 жыл бұрын
3:54 how is 6/4=6 ?
@matthewherzeca3251
8 жыл бұрын
The y intercept can't be a fraction
@ginkomushi7950
8 жыл бұрын
+Clorox Bleach 1.5 then
@armorman3005
5 жыл бұрын
It's not
@t.shurid2042
3 жыл бұрын
there is a mistake, when he divided 6/4 and then in the next line didn't get around to doing that
@Chickenwing38nigeria
11 жыл бұрын
its -2/-3 smart one and negative/negative gives you a positive if you were paying attention in your math class
@mhandschuh6166
3 жыл бұрын
it would have intersected on your graph if you made the intercept 3/2 as it should have been :D
@cypherknot
2 жыл бұрын
6/4 is not 6. I'm confused.
@juansinaaaaaaaaaaa5402
10 жыл бұрын
how do you do this algebraically?
@nigeriawilliams972
3 жыл бұрын
gn
@andlmao4950
Жыл бұрын
@@nigeriawilliams972 gn
@jonahcano3930
9 жыл бұрын
What if y and x r by themselves
@ranaaslam2579
6 жыл бұрын
Then the slope is equal to 1 and the y intercept is the origin
@Buelldozer123TTV
7 жыл бұрын
thanks this helped out a lit
@coopervistrand5669
7 жыл бұрын
Eric buell LLLLLIIIIITTTTT FFFAAAAMMM
@Dre_Lifts
6 жыл бұрын
Actually so helpful lol my math teacher is shit
@tinobeg
Жыл бұрын
Bro teaches better than my tecaher ong the only reason I’m gonna pass
@jasminemely
12 жыл бұрын
6 over 4 equals 6???? 3:36
@xclowninxyt8023
6 жыл бұрын
Ive been studying since 12 am n im still up studying
@chelseamoehle276
6 жыл бұрын
You are my best friend XD
@tomadonna
4 жыл бұрын
why is 6/4 = 6, 6/4 should be equal to 3/2.
@jeshaunwallace3829
11 жыл бұрын
This dude has taught me more stuff about math than my actual math teacher. Just because he made one little mistake -you know the thing that separates humans from machines- You start criticizing him. So sad. I bet you are watching this video to get help, aren't you?
@lfrabood2416
2 жыл бұрын
Legends still watching this video
@peyton4310
3 жыл бұрын
thankyouthankyouthankyou
@raghav_ramesh15
2 жыл бұрын
Error 6/4 does not become 6 in 2nd inequality
@jezzy2.068
5 жыл бұрын
What the f happen in 9:51
@UnvisitedProfile
5 жыл бұрын
When you got over 4 mil subs and less than 200k subs. Hmmmmmmph
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