If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Main content

Unit: Functions

Not feeling ready for this? Check out Get ready for Algebra 1.

0

Possible mastery points

Evaluating functions

Learn

Practice

Evaluate functionsGet 3 of 4 questions to level up!
Evaluate functions from their graphGet 3 of 4 questions to level up!
Evaluate function expressionsGet 3 of 4 questions to level up!

Inputs and outputs of a function

Learn

Practice

Function inputs & outputs: equationGet 3 of 4 questions to level up!
Function inputs & outputs: graphGet 3 of 4 questions to level up!

Functions and equations

Learn

Practice

Function rules from equationsGet 3 of 4 questions to level up!

Quiz 1

Level up on the above skills and collect up to 600 Mastery points

Interpreting function notation

Learn

Practice

Function notation word problemsGet 3 of 4 questions to level up!

Introduction to the domain and range of a function

Learn

Practice

Domain and range from graphGet 5 of 7 questions to level up!

Determining the domain of a function

Learn

Practice

Determine the domain of functionsGet 3 of 4 questions to level up!
Function domain word problemsGet 3 of 4 questions to level up!

Recognizing functions

Learn

Practice

Recognize functions from graphsGet 3 of 4 questions to level up!
Recognize functions from tablesGet 3 of 4 questions to level up!

Quiz 2

Level up on the above skills and collect up to 600 Mastery points

Maximum and minimum points

Learn

Practice

Relative maxima and minimaGet 3 of 4 questions to level up!
Absolute maxima and minimaGet 3 of 4 questions to level up!

Intervals where a function is positive, negative, increasing, or decreasing

Learn

Practice

Positive and negative intervalsGet 3 of 4 questions to level up!
Increasing and decreasing intervalsGet 3 of 4 questions to level up!

Interpreting features of graphs

Learn

Practice

Graph interpretation word problemsGet 3 of 4 questions to level up!

Quiz 3

Level up on the above skills and collect up to 500 Mastery points

Average rate of change

Learn

Practice

Average rate of change: graphs & tablesGet 3 of 4 questions to level up!
Average rate of change of polynomialsGet 3 of 4 questions to level up!

Average rate of change word problems

Learn

Practice

Average rate of change word problemsGet 3 of 4 questions to level up!

Quiz 4

Level up on the above skills and collect up to 300 Mastery points

Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 2000 Mastery points!

About this unit

Functions are mathematical entities that assign unique outputs to given inputs. Sounds simple? Think again! In this topic you will evaluate, graph, analyze, and create various types of functions.