1. Graphing Rules

2. #1: Always draw a line graph!
Bar graphs are useful for comparing a number of unrelated things
Pie charts are good for showing proportions
Line graphs are the most appropriate for showing the relationship between two variables

3. #2: The x-axis of the graph is the independent variable and the y-axis is the dependent variable.
Y changes when x changes, not the other way around.

4. #3: Abrupt changes in a graph tell you that something significant has happened.

5. #4: The title of a graph should always be “The dependence of [dependent variable] on [independent variable].”
Or “The effect of …”

6. #5: Units should always be drawn on both axes of the graph
If you don’t know what units are being used, the graph isn’t very helpful!

7. #6: The data in the graph should fill the page/space.
Scale the axes to cover a larger area and make your graph a better predictive tool.

8. #7: USE A RULER! Hand-drawn axes look sloppy
Lines should be neat to make the most accurate predictions

9. So… 1. Finish graph and turn in.
2. Finish observations and calculate speeds. Keep this sheet.
3. Write lab conclusion turn in today.