It’s just like following a recipe, except instead of ending up with a tasty cake, you end up with a bunch of numbers. We can think graphs of absolute value and quadratic functions as transformations of the parent functions x and x. So next time your math teacher asks you to find the value of a function, just remember: it’s not as scary as it sounds. But at the end of the day, they’re all just rules that tell you how to take one set of numbers and turn it into another set of numbers. Domain and range 2 Functions and their graphs Algebra II Khan Academy 2. Sometimes they involve fractions, exponents, square roots, and all sorts of other funky math symbols. Khan Academys mission is to provide a free, world-class education for anyone, anywhere. Functions and their graphs Algebra II Khan Academy 1. For example, if you have the function f(x) = 2x, this rule is telling you that for any number you input (x), you multiply it by 2 to get your output (f(x)).įunctions can get a lot more complicated than that, of course. Simply put, a function is a rule that connects one set of numbers to another set of numbers. But, if you’re anything like me, you might be thinking “What the heck is a function, anyway?”

I’m sure that many of you have heard the term “function” in math class before.

Functions khan academy algebra 2