Graphing a parabola using roots and vertex | Quadratic equations | Algebra I | Khan Academy

Multiple examples graphing parabolas using roots and vertices

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[jaytradestech]

what was going through the peoples mind when they created this type of math

[actfree]

I love this guy. Helping solve all my math troubles.

[The_Cringe_Connoisseur]

I spend everyday doing nothing in math class, watch a Khan Academy video one day before a test and get a 90%+

[heeilyuh]

guess who has a test tmr morning and didnt study so theyre now on youtube looking at khan academy videos at 1am rethinking life decisions :)

[onedgivesmelife]

Yeah but this is not always the case right? I would like to see more difficult examples like with fractions or something

[franzlove]

sal, when you stated that a+b was -3+-1 you did not write it down as said, instead you wrote -3+1 which gives -2 and not -4 just thought i would point it out bcs i ended up getting stuck on that part and i thought maybe other people would be confused as well.

[aryamangoel]

2:35 It's supposed to be -3-1 instead of -3+1. For those who may have been confused.

[dungeonsdungeonsandmoredun]

I wonder how many other people are watching this going "Ohhh, that's what my teacher was talking about"

[TheGGuYY]

You are the man. I really respect you. You make things so easier so no one still says "I don't understand." Keep the hard work on, you're making great differences in the world.💖

[sadiarahman]

What if you were only given the vertex and y intercept and no equation. How do you graph that? And how do you write the equation of parabola in the form y=a(x-h)^2+k?

[falzyyy]

Я рускоязычный, но это единственное видео которое дало понять как построить график квадратичной функции🤣

[littlemissnicky]

Your voice is so calming, I am about to turn your videos on at night to help me sleep.

[Pike]

Alright.. how can I sit through 7, 45-50 minute classes and still not know sh about how to graph this thing and he teaches alll of it in less time than it takes to get to that class from the lunch room

[cattsphere]

I literally love you, like i was struggling so much but now i actually sort of get it thank you <3

[zadramm]

Which program or app is he using for graph in last bits?!

[cindythompson]

where is this graph tool (0.03) ? thanks, this vid helped me heaps

[natebug]

this is beginning algebra am doing it and am in middle school in beginning algebra but thank you for making these videos am tired

[robertmcausland]

I love Sal however at the beginning of his explanation he says that three points determine the graph of a parabola is misleading. If you plug in x = {-1, 0, 1} those points look like they make a straight line, a student who is a just learning about graphing parabolas is not going to be able to determine the shape.

[williamstroud]

but what do you do when the A variable equals a fraction

[jeremybumpermanpub]

What graphing calculator was Sal Khan using in this video? Does anybody know?