1. Aim: Why are graphs important in the field of science?

2. What is the purpose of a graph?
Graphs provide an organized way to display data.
They provide an easier way to see patterns.
Graphs can be used to make predictions.

3. Creating a Line Graph
Create a title
Each axis must be properly labeled along with respective units
Independent Variable: (the cause) is represented on the horizontal axis (x-axis)
Dependent Variable: (the effect of result) is represented on the vertical axis (y-axis)

4. Numbers on each axis must be consistent.
Points must be plotted in proper location, circled, and connected.
Graphing Vocabulary:
Variable:
a factor that can be changed.
Relationship:
association between two variables.

5. How can we read a graph?
What is the mass of this object if the volume is 100 cm3?
200 grams

6. A is heavier than B
A is faster than B
A is shorter than B
A is younger than B
B weighs less than A
B is slower than A
B is taller than A
B is older than A

7. What are the four types of line graphs?
Direct Relationship:
As time increases, the temperature increases
Temp. (°C)
Time (Hour)

8. As time increases, the temperature decreases
Inverse or Indirect Relationship:
As time increases, the temperature decreases
Temp. (°C)
Time (Hour)

9. As time increases, the temperature remains the same
No change, no relationship:
As time increases, the temperature remains the same
Temp. (°C)
Time (Hour)

10. As time increases, the temperature increases then decreases
Cyclic Event:
As time increases, the temperature increases then decreases
Temp. (°C)
Time (Hour)

11. How can we extrapolate information from our graph?
To infer or estimate by extending or projecting known information.
Extend the line of your graph using a straight edge (ruler).

12. What is the volume of this object if the mass is 400 g?

13. Summary
Why are graphs useful?
What are the two variables plotted on a graph?
How many types of graphs are there? What are their names?
What does it mean to extrapolate information from a graph?

14. What is the density of this object?