4.2 Relations and Functions

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# 4.2 Relations and Functions - PowerPoint PPT Presentation

4.2 Relations and Functions. Standard: SWBAT understand relation and a function; determine if a given relation defines a function. Mini Quiz 33. Graph each number on a coordinate plane (3, -1) (-5, 0) Write the coordinate of the two points. Quick Review.

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### 4.2 Relations and Functions

Standard: SWBAT understand relation and a function; determine if a given relation defines a function.

Mini Quiz 33
• Graph each number on a coordinate plane
• (3, -1)
• (-5, 0)
• Write the coordinate of the two points
Quick Review
• Label all the different parts of a coordinate plane.
• Which “quadrant” are the points located:
• (5, -3)
• (2, 0)
• (–, –)
• (–, +)
Vocabulary

Relations: Set of ordered pairs

Domain (input): 1st coordinates

Range (output): 2nd coordinates

Function: “every input has exactly one output”

What’s the Domain and Range?

Determining Functions Using a Table

What’s the Domain and Range?

Functions Using the Mapping Diagram

What’s the Domain and Range?

Function Using theVertical-Line Test

What’s the Domain and Range?

Is this a Function?

Input Output

Pass!

-2

3

6

0

1

3

Is this a Function?

Input Output

0

6

9

-4

Do Not Pass!

1

3

8

Wrap Up
• Relations and Functions
• Using a Table
• Mapping Diagram
• Vertical-Line Test

HW: P. 184 #1-13 all, 19-31 odd

DLUQ: How does a function pass the vertical line test?