1. Graphs and How to Use Them

2. Graphs Visually display your results and data Allow you (and your peers) to see trends Help to make conclusions easier Are a great way to summarize your experiment!

3. Pie Graphs Used to show parts of a whole (i.e. percentages or fractions) Often used for surveys and categorical and qualitative data

4. Making a Pie Chart 1.Identify how many items make up the whole 2.Identify how many items are in each piece 3.Calculate (or estimate) how big each piece should be and draw it

5. Bar Graphs Used to show changes between groups or over time Often used to show differences between experimental groups and the control(s)

6. Making a Bar Graph 1.Identify your maximum value 2.Set your scale 3.Draw your bars to correspond to the scale you set

7. Graphs and How to Use Them Part II

8. Line Graphs Used to track changes over short or long periods of time

9. Making a Line Graph 1.Identify your minimum and maximum values 2.Set your scale based on these values 3.Plot points spaced evenly apart along the x- axis

10. Scatter Plots Used when you need to see the relationship between two variables. Both the x and y axes represent independent measurements

11. Making a Scatter Plot 1.Identify your minimum and maximum values for both your independent (x-axis) and dependent (y-axis) variables 2.Set your scales accordingly 3.Plot points using a coordinate system (independent value, dependent value)