1. Data and Graphing
Ms MacCormack
Fall 2017

2. Line Graphs Used to show data that is continuous
Points are plotted using x-axis and y-axis
Shows relationships between variables (how/if the IV affects the DV)
Many times, the IV plotted on the x-axis is time.

3. Bar Graphs Data is NOT continuous Bars typically don’t touch
Allows us to compare descriptive data like amounts, percentages or values
There is no order to the categories on the X-axis

4. Pie Graphs Data is NOT continuous
Usually presents data as a “part of a whole” or as a percentage.
Categories add up to 100

5. Steps for Setting Up a Graph Properly
Set up your graphs correctly every time… Remember “Tails Dry Mix”

6. T - Title
Describes both the independent variable and dependent variable
Example: Y vs X

7. A - Axis
Put the independent variable on the x-axis and the dependent variable on the Y-axis

8. I - Interval
The interval (What you count by – 2’s, 5’s, 10’s, etc) needs to be appropriate for the scale.
Choose an interval that lets you make the graph as large as possible.

9. L - Label
Both axes are labeled with the name and units in ( )

10. S - Scale
Find the range (Max – Min value) from data table. Divide the range by the number of intervals you want. We don’t’ want all of the data smushed in only one part of the graph; spread it our and make it as large as you can fit. After dividing, we may need to round up to get a number that is easy to count by.

11. D - Dependent
Dependent variable

12. R - Responding
what is measured/expected to change

13. Y- Y-axis
Vertical axis

14. M - Manipulated
What you change

15. I - Independent
Independent variable

16. X – X-axis
Horizontal axis