Quick Way of Graphing a Quadratic Function in Vertex Form

[Astrofiave]

I am truly greatful for you having done this video, i was one of the few people who didn't understand this in my class, but Now that I see this video, You have helped me understand. God Bless You Professor

[istevenleworld]

@Astrofiave faggot lmfaoo !

[Astrofiave]

@istevenleworld smh

[e521soediv]

Got my college midterm in 2 hours -_- lol.

[ericxsolja]

Well done! We need more teachers like you!

[LiquidSandman]

Thanks a lot!! Just hope my math teacher doesn't get to mad about skipping some of her steps...

[LiquidblueTV]

You explained this much better and faster tan my teacher

[Ilikegirls555]

What if there is no a ...for example f(x)=(x-4)^2-1 how should i graph

[SWAGsurfer85]

@Ilikegirls555 There is an imaginary 1 in front of the parenthesis.

[theoldtimeshmm]

@kyeb123 it is considered a 1 so you just move one over to the right then up 1.

[kyeb123]

What if a = 0?

[aniMangal0v3r]

ur video explain more clearly than my teacher's lesson!! :)

[TheMartinator007]

Thank You so much you really helped me!

[AgentChriszy]

What happens when there is no a value like if its 1?

(x-1)^2+2

[krazycod]

Thank you so much...I had no idea

[ddspeaks]

Omgoodness!! thank you sooo much! My teacher really can't teach at all you made this a heck of a lot simpler than she ever could two thumbs up!! ; ) happy parabola

[joshowers63]

O.O thank you SO MUCH!!! how is youtube so much better at teaching math then my math teacher?

[jenxxJR]

You should do Graphing this in intercept form

[jobeth101]

Thanks :)

Studying for a test and I didn't quite get this during the lesson

(too many ppl talk in during class -.-)

[VanillaBlondie15]

I'm a happy parabola because of this tutorial :)

[norreko]

happy little guy, :)

sad little guy, :(

[boxfreak007]

Thank you for the help!!!!!!! This was a big help, considering the fact that I was sick when we got this lesson.

[dancerboo27]

what if the a value is a fraction?

[11monkeyzrule]

What do you do when there's no number in front of the parenthesis?

[boxfreak007]

@11monkeyzrule That probably means that the value of it is 1.

[Genriquez1994]

oh wow your way was way easier! My teacher showed us a longer way im sooo mad at my teacher. Thanks a lot though im glad i found an easier way.

[cobalt12011]

thank you !!! im in grade 11 now and i had no clue how to graph parabolas since grade 10

[RobbWorld]

@cobalt12011 Always good to here when the videos help.

[dinoateme]

@RobbWorld Well, at least your videos are on math, not english.

[Jord4n09]

damn that happy and sad face thing is the best!

[th3sp0rk]

My teacher put this video on in class, it explains it so well...

[mrdomo718]

you should be a teacher u will help a lot of students

[RobbWorld]

@mrdomo718

I am :)

[MrMarxtin]

@RobbWorld why cant there be more teachers like you

[erlaw1028]

thanks a billion!



[RobbWorld]

@erlaw1028

Glad to help. i hope all my videos have helped.

[thebloggerdog]

i love you......but not my math teacher

[XrushzealX]

WoW!!!! THANKS SOO MUCH!!

[BardocksSynphony]

if i were to determine the vertex form of a quadratic function that gives you the vertex which is (0,0) and the points in which it crosses (6,-9) how would the vertex form equation look like? cause im having trouble applying equations to my graphic calculator

[zeOnlooker]

Happy parabola Sad parabola... THEN THE LINE Thanks for the video- and ever notice that the people online seem to simply teach better? its that or I'm better at seeing the problems done.

[KyleCarrington]

too bad completing the square is such a hassle LOL

[spncryang]

You know i bet over half the people that commented this video are teachers

[gleno61927]

Grade 100

[drilonaaaaa]

i think math teachers should just put youtube on and you will explan thing better than they do

[RobbWorld]

@drilonaaaaa

Thanks for the good feedback.

[MrTsmith101]

I love you

[headahb929]

thank you! big time refresher.

[chibixaileen]

3:08 "sad little parabola" awwwwwww xD lol

[RobbWorld]

@chibixaileen

No problem. My website is wowmath.org if you want more videos.

[Razor9422]

Thank you SO MUCH!!! This vid really helped me out!! unlike my textbook that doesnt explain much -___- lol

Awesome vid :D

[dantheazn36]

Thanks! Made it a whole lot easier! My teacher is an idiot and she has horrible penmanship so you can see why I don't understand this lol But I do now!

[GlamourousGirlified]

OMG r u serious its this freakin easy and my teacher took like 10 minutes trying to explain this in class, i really thought it was me until i found this and got it, HE SUCKS, U ROCK!!

[lauraherrod]

thanks you really helped

[MrOrgaswich]

thanks, i really needed this, my teacher is horrible

[chickadeeonfire]

Extremely imformational.... thanks! You helped me lots

[yeijie456]

a quick question. in vertex form...how do you find the x - intercepts algebraically?

[RobbWorld]

@yeijie456

Replace y with 0. Then solve for x.

You will have to get the square part all by itself and then square root both sides.

[Faeness]

I had a horrible time doing this alone. I was getting...#1...#2...#3 wrong...confused and frustrated..

Then found this video.

And finished the whole assignment in less than 20 minutes. I have a confession. I love you for this. Lmao.

[RobbWorld]

@Faeness

I'm glad you found the video. There are more at wowmath.org.

[Timmieisblack]

why do u go over 1?

[RobbWorld]

@Timmieisblack

It's to hard to explain in text sorry.

[Timmieisblack]

@Timmieisblack is it because you go over 1 because 1 is X and if you make 1 X you can find Y?

[smallfry013]

Oh! So that's what the a does! Thank you so much! ^^

[CrazyBlonde2393]

OMG THANK YOU SO MUCH U ARE A LIFE SAVER!!!!!!!

[pullfatbigflip]

wow way easier

[CanadianKid3699]

WOW you are awesome. I was having trouble with the homework and I happened to stumble on to the video you helped me so much! Thanks!

[RobbWorld]

@CanadianKid3699

Keep getting help on YouTube.

My website might help too. Wowmath.org

[XxSafadixX]

nvm I got it... thanks alot... just started functions 11 and im kinda rusty lol

[XxSafadixX]

i thought we had to multiply -3 but 1,3,5,7.. when do we do that ?

[L4Maulers]

Can this be done with fractions? I tried it with y = -2/3(x^2+2)+4, but it didn't seem to work.

[RobbWorld]

@L4Maulers Yes it should work.

[MrCrzymich]

thanks now i gotz a happy parabola

[pickelou]

wierd on the happy little guy thing

[CcPlawkz]

mmkayy

[cheercds]

i like this method.

[mathdoris]

This is a good shortcut way to graph. Quadratics in Vertex Form.

Summary:

1.) Find and Graph the vertex

2.) Locate "a". Go both left and right 1 unit from the vertex and go up "a" units if "a" is positive OR go down "a" units if "a" is negative (In this problem left and right 1 and down 3 since "a" = -3)

3.) Calculate "4a". Go both left and right 2 units and go the same direction (up/down) "4a" units (In this problem left and right 2 and down 12 since "4a" = -12)

Nice post!

[oscardelahoya92]

thanks alot :)

[crysisman14]

what happens if there is like no a.. i have equation y=(x-1)(squared) +2

[RobbWorld]

That means a=1. Which means you go over 1 and up 1.

[crysisman14]

thx

[patronusmusic]

I'm a very happy parabola right now!

my teacher sucks at his job...

[Lanaki9]

mahalo for uploading this clip. very helpful!