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! …

Inputs and outputs of a function Learn Worked example: matching an input to a function's output (equation)

A function-- and I'm going to speak about it in very abstract terms right now-- is something that will take an input, and it'll munch on that input, it'll look at that input, it will do something to that input.

What are rational functions? How do we plot them? What is their domain and range? Let's find out. We break down the definition of the function given in set-builder form and plot the graph …

Our function definition is now complete, but a function definition just defines how to perform a task. To actually perform that task, we still need to call the function.

Functions assign a single output for each of their inputs. In this video, we see examples of various kinds of functions.

Finding the domain and the range of a function that is given graphically. Created by Sal Khan.

Take your cellular knowledge to the next level! From organelles to membrane transport, this unit covers the facts you need to know about cells - the tiny building blocks of life.

Learn Continuity at a point Worked example: Continuity at a point (graphical) Worked example: point where a function is continuous Worked example: point where a function isn't continuous

The domain of a function is the set of all possible inputs for the function. For example, the domain of f (x)=x² is all real numbers, and the domain of g (x)=1/x is all real numbers except for x=0.