Are there any questions, of an administrative nature about...

- your textbook, study guide, and additional reader, or related to the subject material in Module 01?

- how to use the 15-Module Calendar and the Syllabus.

- financial aid?

- using My EconLab  and how to register for it?

- pre-study bonus point quizzes and post-study bonus point quizzes on BlackBoard?

Remember to mention you are in ECO 201 - Principles of Economics I (Macroeconomics) if you send your questions by email or voicemail.  The answer to your questions are course dependent.

Appendix: Making and Using Graphs

 1.  Interpret a scatter diagram, a time-series graph, and a cross-section graph.

Let's do Study Guide Practice Problems on Study Guide page 8 -15.  
(A solution to Study Guide Additional Practice Problem 1 begins on page 16.)
        

 2.   Interpret the graphs used in economic models.

 3.   Define and calculate slope.

 4.   Graph relationships among more than two variables.

You can accomplish your homework:

(a) by yourself, or (b) by working with other students in a Blackboard discussion group.

1.  Interpret a scatter diagram, a time-series graph, and a cross-section graph.

A.  A scatter diagram plots a graph of one variable against the value of another variable.
B.  A time-series graph measures time along the x-axis and the variable (or variables) of interest along the y-axis.
C.  A cross-section graph shows the values of an economic variable for different groups in the population at a point in time.

2.  Interpret the graphs used in economic models.

A. Graphs represent quantities as distances.  
B.  Most graphs involve only two variables, and other variables are assumed to be unchanging.
C.  Graphs can show the relationship between the variables in an economic model.
D.  Variables that move in the same direction have a positive or direct relationship.
E.  Variables that move in the opposite direction have a negative or inverse relationship.

3.  Define and calculate slope.

The slope of a relationship is the change in the value of the variable measured on the y-axis divided by the change in the value of the variable measured on the x-axis.

4.  Graph relationships among more than two variables.

To graph a relationship among more than two variables, we use the ceteris paribus assumption and graph the relationship between two of the variables holding the other variables constant.  When one of the other variables changes, the relationship shifts between the two that are graphed.

Take the optional post-study bonus point quizzes on Getting Started and Appendix on Saturday following Module 1.

Take the optional pre-study bonus point quizzes on The U.S. and Global Economies on Sunday preceding Module 2.

The Brookings Institution, one of Washington's oldest think tanks, is an independent, nonpartisan organization devoted to research, analysis, and public education with an emphasis on economics, foreign policy, governance, and metropolitan policy.

http://www.brook.edu/