algebra 1 - unit 2 - day 2 - dp functions day 2.notebook · algebra 1 unit 2 day 2 dp functions day...

Algebra 1 Unit 2 Day 2 DP Functions Day 2.notebook October 17, 2017

DO NOW

Algebra 1 10/17/17Aim: What Other Methods Can We Use to Determine if a

Relation is a Function?HW: Identifying Functions Day 2 Worksheet

Below you will find four different relations. Choose which one is not a function and write a statement supporting/explaining your choice.

A) {(0,3), (2,6), (4, 8)}

B) {(1,1), (2,1), (3, 1)}

C) {(1,1), (2,2), (3, 3)}

D) {(1,1), (1,2), (1, 3)}


Aim: What Other Methods Can We Use to Determine if a Relation is a Function?HW: Identifying Functions Day 2 Worksheet

Let's Take a Closer Look at the "Do Now"...

Plot the points of each relation in the "Do Now" on its own coordinate plane. Record what you notice is special about the one that is not a function.

A) {(0,3), (2,6), (4, 8)} B) {(1,1), (2,1), (3, 1)} C) {(1,1), (2,2), (3, 3)} D) {(1,1), (1,2), (1, 3)}



Let's Take a Closer Look at the "Do Now"...

Plot the points of each relation in the "Do Now" on its own coordinate plane. Record what you notice is special about the one that is not a function.

A) {(0,3), (2,6), (4, 8)} B) {(1,1), (2,1), (3, 1)} C) {(1,1), (2,2), (3, 3)} D) {(1,1), (1,2), (1, 3)}

What do you notice about the points in the one that is not a function?


The Vertical Line Test

Each input (xvalue) can be though of as a vertical line.

1 2 3 4 5 6 7 9 1010 9 8 7 6 5 4 2 131

2

3

4

5

6

7

8

9

10

12345678

10

9

x

y

8

x = 5(5,9)

(5,4)

(5,0)

(5,4)

(5,8)



is it a function?

Function

Relation

Map Diagram Vertical Line Test

Output

RangeDomain

Input

A relation where each input (domain) has exactly one output (range)

The set of all xvalues (inputs) of a relation The set of yvalues

(outputs) of a relation

A set of ordered pairs

A diagram that connects each member of the domain to the member of the range

1

0

2

11

If vertical lines hit ONLY one point on the graph of a relation, then it is a function

Graphic OrganizerAlert!



Discuss with Your Neighbor(s)



What About This Example?



How can we visually determine whether or not a graph is a function? Why does this method work?



Start on Your Own Finish with a Partner

Assess as You Work

1

2

3

I got it!

I don't get it

I'm not sure


Is It a Function? Worksheet

Algebra 1 Unit 2 Day 2 DP Functions Day 2.notebook October 17, 2017Aim: What Other Methods Can We Use to Determine if a Relation is a Function?HW: Identifying Functions Day 2 Worksheet

3)


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algebra 1 - unit 2 - day 2 - dp functions day 2.notebook · algebra 1 unit 2 day 2 dp functions day...

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