1. Pictograms and Line Graphs August 24, 2011

2.  Define the following words on your vocabulary sheet:  Line Graph  Trend  Deviations You will have 5 mins alone and then 5 mins with your elbow partner. Vocabulary

3.  A pictogram is a type of bar graph that uses pictures instead of bars to represent the data being looked at.  Why would a pictogram be misleading? Look at the picture on page 209 and talk to your elbow partner about why this graph could be misleading. Pictogram

4.  Evaluate when to use a line graph instead of a pie chart or bar graph.  What can we infer about a line graph and its data points?  Review what makes a good graph. Line Graphs

5.  Page 214 Problems number 4.6 and 4.7 need to be answered in complete, thoughtful sentences.  When everyone finishes we will discuss the answers.  You will keep these problems in your notes to use to study and review. Practice Problems

6. Practice problems and their answers Problem 6  The graph is not a correct comparison because the differences between the interest rates seems to be much larger than they really are. Problem 7  The graph does not fairly represent the data. The area of each CD is more than the percent increase.

7. Page 218 In pairs answer questions 1-5 on your handout. Make sure to answer in complete sentences. Application 4.1 College Students and Credit Cards 1. More than half of college freshmen have credit cards and it jumps to almost 100% by their senior year. The Average credit card debit for freshmen is about $1533 and for seniors is almost $3300. 2. There was about a 42% increase 3. The average credit card debt rose more than 100%

8. Part 4 The percent of students with cards increases over time

9. Part 5 The average debt goes up during the years. Why would this happen?

10. Page 219 14, 15, 16 Make sure to get all the information written down you will need to complete the work. Due Friday Problems for homework