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Recognize different “classic types of graphs” Recognize how the manipulated variable (x) causes a change in the resp PowerPoint Presentation
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AIM: What are some characteristics of graphs? . OBJECTIVES. Recognize different “classic types of graphs” Recognize how the manipulated variable (x) causes a change in the responding variable (y). AIM: What are characteristics of of line graphs?.

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slide1

AIM: What are some characteristics of graphs?

OBJECTIVES

Recognize different “classic types of graphs”

Recognize how the manipulated variable (x) causes a change in the responding variable (y)

slide2

AIM: What are characteristics of of line graphs?

Vocabulary

Best fit graph

Inversely (indirectly) proportional

Directly proportional

slide3

DEFINITION:

  • a LINE GRAPH is a diagram which shows how changing one variable
  • (the manipulated variable) X,
  • causes a second (or responding) variable Y to also change in response.
slide4

EXAMPLE: Number of Frog Croaks

  • Air Temp # of Croaks per minute
  • 22 12
  • 23 14
  • 24 15
  • 25 16
  • 26 17
  • 31 21
  • 32 26
slide5

GRAPH IT!

Don't forget your labels and the title!

slide7

Step Two: label your axis:

30

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide8

Step Three: Plot your Points

30

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide9

Step Four: Draw your Line

30

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide10

Step Four: Draw your Line

30

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide11

Step Four: Draw your Line

30

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide12

Line Graphs: Allow you to estimate trends: “As temperature increases what is happening to the number of croaks?”

25

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

slide13

Line Graphs: Allow you to estimate trends: “As temperature decreases what is happening to the number of croaks?”

25

20

# Croaks per per minute

15

10

22 23 24 25 26 27 28 29 30 31 32

AIR TEMPERATURE Degrees C

three types of line graphs
Three Types of Line Graphs
  • Best Fit
  • Direct
  • Indirect
slide15

Line Graphs “Best Fit Graphs”

  • Normally, best first graphs are only done when the directions explicitly indicate to construct a “best fit graph”

AIM: What is a line graph?

slide21

Line Graphs:

Inverse Proportional vs. Directly Proportional Graphs!

slide22

GRAPH THIS:

Hours of Study Grade

.5 50

1 75

1.5 85

2 90

3 100

slide24

GRAPH THIS:

Hours of TV Grade

1 100

2 90

3 85

4 75

5 60

what is the difference between these two graphs
What is the difference between these two graphs?

Hours of TV vs. Grade

As X increases, Y decreases

Slopes Downward

Indirectly or Inversely Proportional

As X increases, Y increases

Slopes Upward

Directly Proportional

slide27

AIM: What is a Line Graph?

Class ACTIVITY:

Creating Line Graphs page 67

slide28
Homework:

INTERNET QUESTIONS

AIM: What is a line graph?