How to Create Bar and Line Graphs Draw

How to Create Bar and Line Graphs

Draw and label the Axis Y – Axis X - Axis

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

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

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

Scale = 0 to 70 Intervals of 10

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

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

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

Line Graphs can be used to show multiple sets of data

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 Source Food Eaten (grams) Lettuce 4. 0 Mushrooms 8. 2 Dog food 0. 0 Spinach 6. 5 Apple 8. 6 Peach 5. 4 Orange 1. 0

Slugs Favorite Food Grams Eaten 10 9 8 7 6 5 4 3 2 1 0 ge an or h pe ac ap pl e h ac sp in od do g fo s oo m us hr m le t tu ce Grams Eaten

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 Species 1950 1960 1970 Whooping Crane California Condor 24 41 78 76 46 20 Black Swan 56 58 57

90 Endangered Bird Populations 80 Number of Birds 70 60 50 Whooping Crane 40 California Condor Black Swan 30 20 10 0 1950 1960 Years 1970