Direct variation 1 | Rational expressions | Algebra II | Khan Academy

Direct Variation 1

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[whosbeforebros]

wuld love for this guy to be a teacher

[heliteamk]

The first time I understood it was at 3:39

[KRS]

How do you figure out which one is 'x' and which one is 'y'? Like how do you know how gallons purhcased is 'x' and how do you know that the price is 'y'?

[ethanarnold]

WHY DOES THIS GUY MAKE 18 ÷ 2.25 SO COMPLICATED!

[TheOmfgwowdude]

Greatest Teacher in the world, keep up the great work

[kyliec]

Thanks for the help but for the ones that thought it was too complicated, well just think about it, I mean dhh all u do is divide which is equal to 8. You don't really need to do all of that. u do (18 divided by 2.25)

[PJJBOSSMUSIC]

ive been searching for this whole day and it looked so confusing but noww i fully understandd sooo thanks a

[SuperAndrei]

Great! This works well with the Brightstorm videos

[neongirlgreen]

I TOTALLY GET THIS NOW this guy is AWESOME !

[sparklesars]

another way is just divide both of the numbers and thats it :))

[evanfitzpatrick]

I love it when it’s algebra 2 and I’m learning it in pre algebra in 7th grade let’s go dude

[artificium_]

i forgot to mention the way i did it in my head was 2 x 4 = 8 then add 1 because every four twos the .25 equals 1 so then it was 9 and i doubled it to equal 18

[yourfriendlyneighborhoodbe]

Why is K used to represent the constant? Wouldn't make more sense to make it C?

[Gabagabe]

Don't worry, once you get into higher math like calculus, you will prefer equations like y=kx to help you figure out the "answer"

[mickeyminnie]

you write so perfectly with the virtual expo borad i am so jealous!!!

[GumCow]

Man my life stinks a lot I suck at school and everyone hates me.

[brr]

Where are you getting those numbers from. I have my chapter 1 test today and I still don't get this.

[FreedomTooBe]

That's great and everything, but I set up and solved proportions.

[scarydriver]

why can't we just devide the 2.25 dollaes into 18 dollars than using this fcking method

[dave-dubb]

My mathbook doesn't help me, but khan academy does!