1. Section 4: Representing Data
Graphs visually depict data, making it easier to see patterns and trends. K
What I Know W
What I Want to Find Out L
What I Learned

2. Essential Questions Why are graphs created?
How can graphs be interpreted?
Copyright © McGraw-Hill Education
Representing Data

3. Vocabulary Review New independent variable graph Representing Data
Copyright © McGraw-Hill Education
Representing Data

4. Graphing
A graph is a visual display of data that makes trends easier to see than in a table.
A circle graph, or pie chart, has wedges that visually represent percentages of a fixed whole.
Copyright © McGraw-Hill Education
Representing Data

5. Graphing
Bar graphs are often used to show how a quantity varies across categories.
Copyright © McGraw-Hill Education
Representing Data

6. Graphing
On line graphs, independent variables are plotted on the x-axis and dependent variables are plotted on the y-axis.
Copyright © McGraw-Hill Education
Representing Data

7. Graphing
If a line through the points is straight, the relationship is linear and can be analyzed further by examining the slope.
Copyright © McGraw-Hill Education
Representing Data

8. Interpreting Graphs
Interpolation is reading and estimating values falling between points on the graph.
Extrapolation is estimating values outside the points by extending the line.
This graph shows important ozone measurements and helps the viewer visualize a trend from two different time periods.
Copyright © McGraw-Hill Education
Representing Data

9. Add link to video from page 57 here.
Tracking Crime
Concepts in Motion
FPO
Add link to video from page 57 here.
Copyright © McGraw-Hill Education
Representing Data

10. Review Essential Questions Vocabulary Why are graphs created?
How can graphs be interpreted?
Vocabulary
graph
Copyright © McGraw-Hill Education
Representing Data