Graphing!

Independent variable Goes on X axis What is changed/controlled in an experiment or time Y X

Dependent variable Goes on the Y axis The thing being measured/observed during an experiment Y X

Types of graphs Line- shows how independent variable affects dependent variable. Example: how time affected the number of bacteria

Types of graphs Bar- shows relationship between groups/categories Example: Number of birds that like eating different types of seeds Number of Birds Seed Preference

Types of Graphs Pie- show percentage or portions of one category Example: How much water used in different areas of the American home.

Graph Titles Number of Teenagers with Cellphones ALWAYSSSSS has independent and dependent variable in the title!!!!!

Steps to Make Graph Fit! Formula: Range = Highest Value – Lowest Value Scale = Range ÷ Number of Boxes on Axis Find the range of date for the Y Axis (67-32 = 35) Count number of lines/boxes on the Y axis graph paper (20) Divide the range number by the number of boxes on Y axis (35÷20 = 1.75) Round UP if needed!!! (1.75 = 2) Each box will now be worth 2 points Repeat steps above for X axis

Labeling Axes If there is numbers or categories on the graph, it must be labeled!

T.A.I.L.S Title: Includes both variables Axis: Independent variable on X-axis and dependent variable on Y-axis Interval: The interval is appropriate for this scale. Label: Both axes are labeled. Scale: Min and max values are appropriate.