1. Aim – How can we represent quantities graphically?
Lesson 4

2. Making a Graph
What is the purpose of a graph? Graphs allow you to quickly and easily compare the results of an experiment
Who uses graphs?

3. What are the different types of graphs?
Line Graphs
Bar Graphs
Pie Charts

4. Graph- is a visual display of data.
Graphing
Graph- is a visual display of data.
independent variable- is the variable that you can control (x-axis/ horizontal) the “I changed it variable”
dependent variable- is the variable that changes accordingly with the independent variable (y-axis/ vertical)

5. Identify the independent and dependent variable
Steps to create a graph
Identify the independent and dependent variable
Determine the range of the data that needs to be plotted for each axis.
Number and label the data points.
Plot the data points.
Draw the best fit line
Give the graph a title.

6. Graphical Relationships – How one variable changes based on the other
Direct Relationship:
increases
As one variable increases, the other __________________.

7. Direct relationship
What are some examples you can think of?

8. Graphical Relationships
Indirect Relationship:
decreases
As one variable increases, the other __________________

9. Indirect Relationship
What are some examples you can think of?

10. Graphical Relationships
Cyclic Relationship:
As one variable increases, the other
changes in a predictable pattern
Events that are cyclic are also ___________________
predictable

11. Cyclic Relationships
Tides
Phases of the Moon
Examples

12. Graphical Relationships
No Relationship:
stays the same
As one variable increases, the other __________________

13. Graphical Relationships in Words
State in words the relationship between relief and the average rate of erosion as shown in the graph.
As relief increases, the average rate of erosion increases

14. Graphical Relationships in Words
State in words the relationship between air temperature and relative humidity.
As the air temperature increases, the relative humidity decreases