How to interpret an expression with function notation | Functions | Algebra I | Khan Academy

Sal interprets the expression M(30)-M(0)=100 where M models an account balance over time.

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.

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.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Algebra channel:

[averyschroth]

I love your voice. It somehow makes things much clearer to interpret.

[GenAfterNextTactics]

I dont know why but this does not stick in my brain. I've watched all of your "Function notation word problem" videos and I still don't understand it.

[lalalalalalalalalol]

i feel like an idiot being in 9th grade not knowing how to do this

[smk]

it’s quite funny how this video has 160k views and 3 comments (including me.)