• 3:2:1• Write down three things you know

about graphing!• Write down 2 things you want to

know about graphing.• Write down 1 question you want me

to answer.

Warm-up

Analyzing Data with a

Graph

Pie Graph• Best for data that

is part of a whole• Good to see

proportion of each part

Pie Graph• Instruction for

drawing– Divide circle into

sections based on the percentage of the whole

Bar Graph• Best for comparing

individual items or events

• Allows you to see how large or small the differences in individual events are

Line Graph

• Best for continuous changes

• Allows you to see the change (ex: in speed, temperature)

Line Graph

• X-axis: independent variable

• y-axis: dependent variable

Line Graph

• Example: Temperature in New York City over a period of six days

Which axis?

• A population of sea monkeys is counted for three weeks.– X-axis = weeks– Y-axis = population of sea monkeys

• Plant height is measured over a period of 8 weeks.– X-axis = weeks– Y-axis = plant height

Which axis?

• The amount of oxygen consumed per minute is measured while exercising.– X-axis = time (minutes)– Y-axis = amount of oxygen

• The amount of food (in grams), eaten by a person each day is monitored. – X-axis = day– Y-axis = amount of food in grams

Creating a Line

Graph

Data

Time (weeks)

Height (cm)

0 4

1 6

2 9

3 12

4 16

5 19

6 21

7 23

8 25

• For eight weeks you monitor the growth of your house plant.

• You record the following information:

Step 1 Title the

Graph

8 Week Observation of House Plant Growth

Step 2 Label Axis with

UNITS

Time (weeks)

Heig

ht

(cm

)

8 Week Observation of House Plant Growth

Step 3 Axis

Scale: Spread It Out

Time (weeks)

Heig

ht

(cm

)

0

126

8642

18

24

8 Week Observation of House Plant Growth

Step 4 Plot

the Data

Points

Time (weeks)

Heig

ht

(cm

)

0

126

8642

18

24

●●

●●

●

●●

●●

8 Week Observation of House Plant Growth

Step 5 Put

in Best Fit

Line

Time (weeks)

Heig

ht

(cm

)

0

126

8642

18

24

●●

●●

●

●●

●●

8 Week Observation of House Plant Growth

NOW YOU HAVE A

GRAPH . . . IT IS TIME TO TRY IT ON

YOUR OWN!!