Graphing a parabola with a table of values | Quadratic equations | Algebra I | Khan Academy

Graphing a parabola with a table of values
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Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.
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im crying while watching this

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Aw why?

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Jesse Sanson, agreed!

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I don't know how and why, but you just clear the same doubts that I have! Thanks a lot Salman Khan Sir:) May God Bless You.......!

[@koalabear9769]

I'm not an expert at this, but to help you out, I've noticed if your x is squared, then negatives and positives will be the same. So in his example: -3x^2 +8, -1 would have the same value as 1

[@AlimGicic]

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[@nairagar7338]

nice~ this clears up some questions. thanks

[@davidrajbanshi8151]

Wow! Outstanding.

[@_Lorraine]

I finally understand thank you

[@dbztrunkscion8787]

X squared = Parabola

[@susantparida8369]

Thanks! Humein to pata hi nahi tha!

[@thatnewguy5298]

God bless u bro u helped me so much

[@diegonayalazo]

Thanks

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i don't understand i don't understand i don't understand i don't understand

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[@jmanj0sh]

Thanks! Helped alot.

[@brendanwright1038]

thank you i really needed this

[@thebread5913]

How do you do the reverse of this?

[@adityabiswas7912]

It's been 8 years lol.

[@Sabrina-be9cn]

me ayudaste muchísimo!!! gracias por el video :) perdón por comentar en español, mi ingles es realmente malo :v

[@dbztrunkscion8787]

That Graph is perfect

[@naomiedwin1733]

Hey I know thats it is 3 years later, but why did you use -2 to positive 2?...can't you use any other numbers?...

[@ayushi6703]

Yes we can use any number, it's just that we can easily represent the graphs with small numbers.

[@prettyrichopp.18]

who else is here watching this in 2022??

[@Rayzium]

omg ty so much

[@juliexbya.9173]

Ilove it. thanks

[@ibra114]

Does it matter what numbers you use in tge table of values... If doesn't will my graph be different than any other graoh with different numbers.. Someone please help

[@ashutoshchaudhari4827]

Ibracobra to find the *vertex* use *-b/2a*

[@susantparida8369]

X coordinate can be found by formula -b/2a. Then substitute there value of x into the original equation. You will get the y coordinate of the vertex.

[@carl8738]

m8 i had a whole APIFFANY when u explained it

[@snubuns5520]

If it’s -3 how do you know it’s going to open down...?

[@snubuns5520]

Aryan Ramdaras I know I got that now but thx!

[@thelux8539]

I don't get it :(

[@snubuns5520]

The Lux you probably got it by now since this comment was 4 YEARS AGO.

[@aljantorrecer4424]

guys can you answer this? y=-x^2+4

[@generalgum]

lmao i have to do that for my class except its y=x^2-4

[@deocal]

Honestly better then my teacher lol