1. Warm-up 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.

2. Analyzing Data with a Graph

3. Pie Graph Best for data that is part of a whole
Good to see proportion of each part

4. Pie Graph Instruction for drawing
Divide circle into sections based on the percentage of the whole

5. Bar Graph Best for comparing individual items or events
Allows you to see how large or small the differences in individual events are

6. Line Graph Best for continuous changes
Allows you to see the change (ex: in speed, temperature)

7. Line Graph
X-axis: independent variable
y-axis: dependent variable

8. Line Graph
Example: Temperature in New York City over a period of six days

9. 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.
Y-axis = plant height

10. 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

11. Creating a Line Graph

12. Data For eight weeks you monitor the growth of your house plant.
You record the following information:
Time (weeks)
Height (cm) 4 1 6 2 9 3 12 16 5 19 21 7 23 8 25

13. 8 Week Observation of House Plant Growth
Step 1 Title the Graph

14. Step 2 Label Axis with UNITS
8 Week Observation of House Plant Growth
Height (cm)
Time (weeks)

15. Step 3 Axis Scale: Spread It Out
8 Week Observation of House Plant Growth
Step 3 Axis Scale: Spread It Out 24 18
Height (cm) 12 6 2 4 6 8
Time (weeks)

16. Step 4 Plot the Data Points
8 Week Observation of House Plant Growth
Step 4 Plot the Data Points ● 24 ● ● ● 18 ●
Height (cm) 12 ● ● 6 ● ● 2 4 6 8
Time (weeks)

17. Step 5 Put in Best Fit Line
8 Week Observation of House Plant Growth ● 24 ● ● ● 18 ●
Height (cm) 12 ● ● 6 ● ● 2 4 6 8
Time (weeks)

18. NOW YOU HAVE A GRAPH . . . IT IS TIME TO TRY IT ON YOUR OWN!!