## Domain and range of a function given a formula | Algebra II | Khan Academy

Domain and Range of a Function Given a Formula

Practice this lesson yourself on KhanAcademy.org right now:

Missed the previous lesson?

Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We’ll again touch on systems of equations, inequalities, and functions…but we’ll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don’t let these big words intimidate you. We’re on this journey with you!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We’ve also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

Subscribe to Khan Academy’s Algebra II channel:

algebra tutors,[vid_tags]

algebratutors.org

### 27 Responses to “Domain and range of a function given a formula | Algebra II | Khan Academy”

1. NTIM BENJAMIN says:

like ei! we have a long a way to go oo

2. Khurshida Firdaush says:

Thanks sir for explaining this topic . You helped me a lot . I never saw teacher like you .

3. Very nice person says:

I should have learnt this and lots of other topics a year ago but I couldn’t understand it no matter how much tutorial classes I’ve attended or videos I’ve watched 🥲 math is killing me

4. Steven Vataleni says:

God save us.

5. KYLE BELL (Student) says:

6. tinfoil says:

BRO THE WAY MY MATH TEACHER EXPLAINS IT MAKES NO SENSE LIKE AM I STUPID OR SOMETHING?!?

7. Megan Biles says:

staar test tmr bro i havent been to school in a month…

8. James Wei says:

I’m confused

9. Fenrir says:

Me: What now

10. Alaylay says:

Crying over my homework right now because it's overdo and I still don't understand 😉

11. Bushra Asfandyar says:

So can we write the range as y>= -5 ?

12. Milky YOUNIVERSE says:

This is very complicated cause I am learning this in the 8th grade…

13. Enterpreneurship says:

Hi, I am a student of University of the People, I have really benefited a lot from your programs. Thank you so much for all your selfless efforts to help us as students. We have learned a lot.

14. Austin Fudge says:

What you explained made since but couldn’t you have inputted x as another number or value to get the same curve or slope. Why did you choose -2 or how did you know it was -2. The domain and range would change depending on what numbers you chose so that’s why I’m confused. I understand that x to the 2nd power creates a quadratic function but confused on what the answer was if there was one answer to this question or problem. Thank you for your time

15. Sahiba Mehry says:

I am going to get 2 points tomorrow because of this video. Thanks, Khan Academy !!

16. hhh qqq says:

crap, i think its time excuted code: red. Time to pull out the big guns its coffee time

17. hhh qqq says:

math: This is understandable and reasonable.
also math: ok so we have imaginary numbers

Kind of a side question ive had mostly guys for my math teacher in high school and 3of them are bald. Is math going to make me bald

19. MICHAEL TAKARZINEH says:

I guess maths was not meant for me. lol

20. Mercurial Thrills says:

It's so frustrating when you're doing math and have some online classes… and your teacher gives you PDF printouts of old lessons…. and he writes the symbol for absolute value (this one —> |) the same as he writes the number one. That's only one of my problems when it comes to the domain and range.

21. Rafael Rei G. Pizarro says:

Funny how i'm learning more from this channel than my PAID college.

22. Jess _T says:

I'm furiously sweating I have an exam on 8 mins

23. Bobur Yusupov says:

Very good!!! Good luck to Khan Academy Group

24. Namthipp Vannalathh says:

Thank you, you save me through high school😂

25. CosmicGamer says:

thanks, nice video

26. William Munny says:

Thanks a lot for the video.

27. Annalisia Sherwood says:

So can someone explain to me why he kept putting the " – " sign when working out the answers like 3(4) "- " 12 -2=2 instead of putting the " + " sign 3(4) "+" 12-2=2 ?