Chapter 1Chapter 1

Graphing

Types of GraphsTypes of GraphsType of Graph

What does it show? Example Drawing

Scatterplot

Bar graph

Pie graph

Line graph

used to determine if two variables are related

used to compare groups of information

shows how a whole is divided into percentages

used to show trends in data over time

ScatterplotsScatterplots

• Scatterplots show how a change in one variable influences another variable

• Independent variable: the variable on the x-axis; the variable we change in an experiment

• Dependent variable: the variable on the y-axis; the variable we measure in an experiment

Ms. Brownson’s Graphing RulesMs. Brownson’s Graphing Rules1. Make it big and beautiful! Fill the whole graph space.2. Use even intervals:

- Divide the range of your data by the number of boxes/lines.3. Include the following elements:

- a descriptive title- labels with units on the x and y axes

Relationships between VariablesRelationships between Variables

• Direct Relationship: when one variable increases, the other variable increases too

Relationships between VariablesRelationships between Variables

• Indirect Relationship: when one variable increases, the other variable decreases

Relationships between VariablesRelationships between Variables

• No Relationship: no pattern exists between the two variables