Functions | Algebra 1 | Math | Khan Academy
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! Power up your …
Worked example: domain & range of step function - Khan Academy
Finding the domain and range of a piecewise function that is constant in each segment. Such functions are called "step functions."
Worked example: domain & range of piecewise linear functions
Finding the domain and range of a piecewise function where each segment is linear.
Examples finding the domain of functions - Khan Academy
- [Instructor] In this video, we're gonna do a few examples finding domains of functions. So let's say that we have the function f of x is equal to x plus five over x minus two.
Worked example: determining domain word problem (positive integers)
Does the domain only refer to the input to the function? Or does it also refer to the output? For example, is the domain of P (b) different from the domain of b?
Graph of y=sin (x) (video) | Khan Academy
What is the domain of sine of the sine function? And just as a reminder, the domain are all of the inputs over which the function is defined, or all of the valid inputs into the function that the function will …
Restrict domains of functions to make them invertible
Given the graph of a function, find ways to restrict its domain in order to make it invertible.
Worked example: determining domain word problem (real numbers)
The domain of a function, that's a set of all the inputs for which the function is defined. And the inputs here, this is t and it represents days and if I input t, the number of days, into the function h, it'll output …
Function domain word problems (practice) | Khan Academy
Use information about a situation to figure out the domain of the function which models it.
Intervals and interval notation (video) | Khan Academy
Introducing intervals, which are bounded sets of numbers and are very useful when describing domain and range. We can use interval notation to show that a value falls between two endpoints.