Sal uses function notation to help Frank figure out how much water he can put in his balloon. Created by Sal Khan.

If you're talking about evaluating functions, then it works the exact same way as evaluating algebraic expressions. Replace all instances of the variable with its substituted value, and …

About this unit A function is like a machine that takes an input and gives an output. Let's explore how we can graph, analyze, and create different types of functions. Unit guides are here! …

Evaluate functions for specific inputs given the formula of the function. Functions are written using function notation.

If you've seen the earlier videos, you will understand that functions simply generate an output from an input. Thus, there are infinite applications - it's used anytime there is a correlation …

Learn how to interpret expressions that contain a function within a real-world context. In this video, the function we interpret models an account balance over time.

We can describe sums with multiple terms using the sigma operator, Σ. Learn how to evaluate sums written this way. Summation notation (or sigma notation) allows us to write a long sum in …

Video transcript - [Instructor] We're told the table above shows some values of the functions F and G. For which value of X is F of X minus G of X equal to X? Pause this video and see if you can …

A lot of times, when you first start looking at these function composition, it seems really convoluted and confusing, but you just have to, I want you to take a breath and take it one …

Interpret expressions with function notation in terms of the context that the function models.