Explain in your own words what a function is. Use the terms 'input' and 'output' in your explanation.

A function is a relationship where each input has only one output.

Consider the relation represented by the set of points: {(1, 2), (2, 4), (3, 6), (1, 5)}. Is this relation a function? Explain why or why not.

No, this relation is not a function because the input 1 has two different outputs, 2 and 5.

Draw a mapping diagram that represents a function. Explain why your diagram represents a function.

Mapping diagram with unique outputs for each input. Explanation should state that each input maps to only one output.

Create a table of values that represents a function. Explain why your table represents a function.

Table with unique outputs for each input. Explanation should state that each input has only one corresponding output.

The equation y = 3x + 2 represents a relation. Is this relation a function? Explain your reasoning.

Yes, this relation is a function because for every value of x, there is only one corresponding value of y.

Identifying Functions

Name: Identifying Functions
Author: Insta~Lesson

9th Grade · Math · 60 min

Lesson Preview

Learning Objective

I can determine if a relation is a function using the vertical line test.

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Identifying Functions

Lesson Preview

Learning Objective

Warm-Up Video

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Exit Ticket

Related Lessons

Measuring Inches and Half Inches

Solving Exponential Equations

Finding the Inverse of a Matrix

Related Lessons

Measuring Inches and Half Inches

Solving Exponential Equations

Finding the Inverse of a Matrix

New to Insta~Lesson?

About Insta~Lesson

How Insta~Lesson Helps Teachers Plan

How Insta~Lesson Supports Instruction Schoolwide