1. How to Create Bar and Line Graphs

2. Draw and label the Axis Y – Axis X - Axis

3. Identify and label variables Y – Axis Dependent Variable (what is being observed) X - Axis Independent Variable (what is being changed by scientist)

4. Helpful Hint: DRY MIX D.R.Y.M.I.X. D – Dependent M – Manipulated R – Responding I – Independent Y – Y axis X – X axis

5. Scale and Intervals Decide on an appropriate scale Minimum and maximum numbers used on each axis. May not start with zero Numbers used should be a little below the lowest value and a little higher than the highest value Use common and consistent intervals

6. Scale = 0 to 70 Intervals of 10

7. Title and labels Place an appropriate and descriptive title at the top of your graph Label the Y and X axis with their variables (X with the independent variable and Y with the dependent variable

8. Bar Graphs Compare groups by showing relative amounts (totals) or categories

9. Line Graphs Show relationship between the independent and dependent variable Used to show trends and make predictions

10. Line Graphs can be used to show multiple sets of data

11. Slugs were fed a variety of foods to determine their feeding preferences. Based on the data given, construct the appropriate graph and formulate a conclusion. Food SourceFood Eaten (grams) Lettuce4.0 Mushrooms8.2 Dog food0.0 Spinach6.5 Apple8.6 Peach5.4 Orange1.0

12. Slugs Favorite Food

13. Every ten years scientists counted the number of 3 endangered birds to see if their conservation efforts were working. Review the data table, construct the appropriate graph and formulate a conclusion. Bird Species195019601970 Whooping Crane 244178 California Condor 764620 Black Swan565857

14. Endangered Bird Populations Number of Birds Years