2-3 Interpreting Graphs

Use the table for problems 1 and 2.

1. In which week did Alicia save the most?

2. How much did Alicia save in all?

week 3

$25

Bell Work

2-3 Interpreting Graphs

I can I c•match real world situations to graphs

•create a graph that matches real life situations to graphs

•tell the difference between discreet and continuous points

an match real world situations to graphs.

Learning Target:

2-3 Interpreting Graphs Vocabulary

Discrete Points:

Continuous Points:

• data points that can be only specific values

• ex: number of kids in a class

• data points that can take any value

• ex. temperature

2-3 Interpreting Graphs

Data

Discrete Continuous

5 5.345

2-3 Interpreting Graphs

The graphs show the speeds of two cars over time. Tell which graph corresponds to each situation. Graph 2 Graph 3

Example 1 – this is NOT on your note sheet!

Time

Sp

ee

d

0

10

20

30

40

50

60

Time

Sp

ee

d0

10

20

30

40

50

60

Mr. Lee is traveling on the highway. He pulls over, stops, then accelerates rapidly as he gets back on the highway. Graph 3

2-3 Interpreting Graphs

The graphs show the speeds of two cars over time. Tell which graph corresponds to each situation. Graph 1 Graph 2

Example 2 – this is NOT on your note sheet.

Time

Sp

ee

d

0

10

20

30

40

50

60

Time

Sp

ee

d0

10

20

30

40

50

60

Ms. Montoni slows down as she leaves the main road. She continues to slow down as she turns onto other streets and eventually stops in front of her house. Graph 1

2-3 Interpreting Graphs

Example 3 – Do this on your note sheet.

Tell which graph corresponds to the situation described below.

Time

Run

ner’

s S

peed

Time

Run

ner’

s S

peed

Time

Run

ner’

s S

peedGraph 1 Graph 2 Graph 3

Melissa builds up her speed during the beginning of the race. She maintains her running speed for the remainder of the race.

Graph 1—Melissa’s speed increases at the beginning and then the graph remains constant.

2-3 Interpreting Graphs

Create a graph for the situation. Tell whether the graph is continuous or discrete.

The table showsthe temperatureinside a car over time.

Time 8:00 8:30 12:00 12:30Temp.(F) 71 71 82 74

Car Temperature

Time

Tem

p (

F)

The graph is continuous.

Example 4

2-3 Interpreting Graphs

Create a graph for the situation. Tell whether the graph is continuous or discrete.

A market sells pumpkins for $5 each.

Pumpkin Cost

0

5

10

15

20

25

30

35

40

0 2 4 6 8

Pumpkins Purchased

Cost(

$)

Example 5

The graph is discrete.

2-3 Interpreting Graphs

Do you have the learning targets mastered?

Then prove it!

2-3 Interpreting Graphs

Lesson Quiz Tell which graph corresponds to the situation. Then tell whether the graph is continuous or discrete.

A bus pulls out from the gas station. It drives to its first stop. Then the bus gets on the expressway.

Graph A Graph B

Graph B; continuous

Time

Sp

eed

Time

Sp

eed

2-3 Interpreting Graphs

Assignment:

Lesson 2.3

Page 61

problems 1-9, 11-14, 16