What is the range of a function? | Functions | Algebra I | Khan Academy

Sal introduces the concept of "range" of a function and gives examples for functions and their ranges.

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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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[jamikemichelohia]

I'm now in college in 2020, and this video just recapped everything i need to know about domain and ranges.
Thanks sal 🙏

[reatile]

This is one of the most difficult things to Understand

[RiddhiKhan]

Quick and dirty. Just my style. ;)


I'm so gonna fail tomorrow.

[fierybookworm]

This is perfect! Now I totally get it! Thanks a lot~! ^_^

[randomstuff]

If you're seriously concerned about failing your exams, just become a police officer. Legit all you need to do is pass a medical and pass an exam that asks for you to give a logical answer. In the UK we can get paid start salaries of ~£27K and have a full scholarship in the first four years, and after seven years you can earn up to ~£45K. That's my backup :D

Or just become a teacher, most of them don't know what they're doing either... xD

[caobilly]

Tｈis is Really Really helpful!Ｔｈａｎｋｙｏｕ

[galleryg]

It’s easy to watch because he has a nice voice

[alisonbarker]

Dear Mr. Khan, thank for your videos, I am attempting to learn maths by myself. The first video on Functions was funny. I read somewhere that you need funds to continue? Is this correct? p.s. Do you or one of your viewers know of an online community of people teaching themselves mathematics? G'day from Australia

[pookie]

Thank you very much, you made this all so much easier to understand!

[abeersiddiqui]

no one:
sal: let me just change the color here

[hervelowe]

This helps a lot thank you your the best

[Asad-xuxm]

the FIRST khan academy video that's not helpful

[itzelgarcia]

i have finals this week and i need serious help on domain and range of a graph and inequalities pls help!

That was brilliantly explained. Thanks

[leisusiel]

I am going to do my ig this year and this really help me to predict all the key words I can’t understand❤😊❤

[borissimovic]

This video is very inspiring so I came up with an idea of how to intuitively explain this may be this will help someone: Imagine that a function is a Factory (for example a mortar factory 🏭, and what is a domain? Well, it can't be for example meat, flowers, wood, etc because this factory ie function is not defined to prices these inputs, so our domain is sand, cement, water, etc. What is our output? It's a mortar and that's the range of this function(factory). So functions and factories have something in common they both have inputs, a factory has specific properties and well-defined tasks it is specified in what it should do so does the function, and they both have outputs ie range.

[yusufenver]

i wish my lecturers drew in such clear format

[ardiawanbagusharisa]

What if we have more variables? i.e. f = a + b + c / d * e ? how can we find the range?

[vanjosh]

Khan Academy can you make a video in how to find the degrees of a bigger hand and smaller hand in a clock and the angle of both hands cover? please :D

[freaksavagegameryt]

Why i can't handle this and i well fail tomorrow to. 1 like 1 prayer