# Functions

## Evaluating functions

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What is a function?Worked example: Evaluating functions from equationWorked example: Evaluating functions from graphEvaluating discrete functionsWorked example: evaluating expressions with function notation
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

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Worked example: matching an input to a function's output (equation)Worked example: matching an input to a function's output (graph)Worked example: two inputs with the same output (graph)
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

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Equations vs. functionsObtaining a function from an equation
Practice
Function rules from equationsGet 3 of 4 questions to level up!

## Interpreting function notation

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Function notation word problem: bankFunction notation word problem: beach
Practice
Function notation word problemsGet 3 of 4 questions to level up!

## Introduction to the domain and range of a function

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Intervals and interval notationWhat is the domain of a function?What is the range of a function?Worked example: domain and range from graph
Practice
Domain and range from graphGet 5 of 7 questions to level up!

## Determining the domain of a function

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Determining whether values are in domain of functionExamples finding the domain of functionsWorked example: determining domain word problem (real numbers)Worked example: determining domain word problem (positive integers)Worked example: determining domain word problem (all integers)
Practice
Identifying values in the domainGet 3 of 4 questions to level up!
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

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Recognizing functions from graphDoes a vertical line represent a function?Recognizing functions from tableRecognizing functions from verbal descriptionRecognizing functions from verbal description word problem
Practice
Recognize functions from graphsGet 3 of 4 questions to level up!
Recognize functions from tablesGet 3 of 4 questions to level up!

## Maximum and minimum points

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Introduction to minimum and maximum pointsWorked example: absolute and relative extrema
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

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Increasing, decreasing, positive or negative intervalsWorked example: positive & negative intervals
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

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Graph interpretation word problem: temperatureGraph interpretation word problem: basketball
Practice
Graph interpretation word problemsGet 3 of 4 questions to level up!

## Average rate of change

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Introduction to average rate of changeWorked example: average rate of change from graphWorked example: average rate of change from table
Practice
Average rate of change: graphs & tablesGet 3 of 4 questions to level up!

## Average rate of change word problems

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Average rate of change word problem: tableAverage rate of change word problem: graphAverage rate of change review
Practice
Average rate of change word problemsGet 3 of 4 questions to level up!

## Intro to inverse functions

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Intro to inverse functionsIntro to inverse functionsInputs & outputs of inverse functionsGraphing the inverse of a linear functionFinding inverse functions: linear
Practice
Evaluate inverse functionsGet 3 of 4 questions to level up!
Finding inverses of linear functionsGet 3 of 4 questions to level up!