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3U 1 day 4 Relations and Functions 2018.notebook 1 February 07, 2018 Warm Up ... Text Book pg 2 Just sketch Relations and Functions Learning Goals define and determine Domain and Range define and determine if a relation is a function

Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

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Page 1: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

1

February 07, 2018

Warm ­ Up  ...        Text Book  pg 2

Just sketch

Relations and Functions

Learning Goals­ define and determine Domain and Range­ define and determine if a relation is a function

Page 2: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

2

February 07, 2018

Relation ­ a connection between a pair of quantities ­ expressed in 

WordsTable of ValuesGraphEquation Mapping DiagramSet of ordered pairs

     Function  ­ is a relation

­ each value of the independent variable corresponds   with only one value of the dependent variable

  (For every x there is only one y)

Every relation is NOT a function.

For a week prior to their physics exam, a group of friends collect data to see whether time spent studying had a correlation with their marks on the exam.

We can describe a relation using:

Words Table of values

Graph

Page 3: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

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February 07, 2018

Equation

Mapping Diagram

Set of ordered pairs

Is this Relation a Function?

How to determine if a relation is function.

Graph ­ Vertical Line Test

Table of Values, Mapping Diagram, Set of Ordered Pairs ­  For each "x" there is only one "y"

Equation ­ What is it?   All lines are Functions.All parabolas are Functions.All circles are not Functions.If you don't know what it is graph it on your NSpire 

          and use the Vertical Line test.

Page 4: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

4

February 07, 2018

Function or Not?

Page 5: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

5

February 07, 2018

Function 

or Not?

Function or Not?

Page 6: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

6

February 07, 2018

Domain ­ set of all independent values  (the x­values)

D = { x                             , x             }

D = { x                             , x             } ­­ for a list

Range ­ set of all dependent values (the y­values)

R = { y                             , y             }

State  ­ function or not   ­ domain and range

 y = 2x +5

y = x2 + 5

x2 + y2 = 25  

On the Boards...

Page 7: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

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February 07, 2018

On the Boards...

Page 8: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

8

February 07, 2018

Seatwork

pg 10 # 1, 2, 4, 6, 7, 9

use TI­Nspire

Page 9: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

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February 07, 2018

Page 10: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

10

February 07, 2018

Page 11: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

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February 07, 2018

Answers

Page 12: Relations and Functions...3U 1 day 4 Relations and Functions 2018.notebook 2 February 07, 2018 Relation a connection between a pair of quantities expressed in Words Table of Values

3U ­ 1 ­ day 4 ­ Relations and Functions 2018.notebook

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February 07, 2018