1. Warm Up 1.Take out your homework WS to be checked. 2.Create a stem and leaf plot from the data you read in the line plot below. X X X X X X X X X X X XX X 9 10 11 12 13 14 15 16 17 18 19 20

2. Homework Check ~ WS: Reading Graphs 2. F 3. B 4. I 5. C 8. F 9. D 14.F 18. G 19. C

3. Class Notes: Bar Graphs & Histograms Bar Graphs  are a method of comparing data by using solid bars to represent quantities  can display non-numerical data Favorite Colleges 10 9 8 7 6 5 4 3 2 1 Duke UNC NCSU NCCU Other

4. Class Notes: Bar Graphs & Histograms Histograms  are a type of bar graph  Use only numerical data  Data is given in intervals  Tell the frequency of those intervals occuring  Bars always touch GPAs of Students Accepted at Duke 900 750 600 450 300 150 0 2.1-3.0 3.1-4.0 4.1-5.0 5.1-6.0

5. Class Notes: Bar Graphs & Histograms Bar GraphHistogram

6. Class Work (in groups)  Collect worksheet 2-7 Practice: Word Problems from the counter.  Don’t forget to write this in your binder contents sheet!  Complete problems 1-6.

7. Warm Up  Are these bar graphs or histograms? Explain how you know. A.Students’ Shoe Size 8 6 4 2 0 5-6 7-8 9-10 11-12 13-14 B.Students’ Favorite Jersey Number 8 6 4 2 0 5 10 13 23 34 44 50

8. Exit Slip  Get out a scrap sheet of paper.  In your own words, tell me what are the differences between bar graphs and histograms.

9. Warm Up  In your own words, list the steps to making a histogram.

10. Migraine Histograms Drug A 16 14 12 10 8 6 4 2 10-29 30-49 50-69 70-89 90-109 110-129 Drug B 16 14 12 10 8 6 4 2 10-29 30-49 50-69 70-89 90-109 110-129

11. Warm Up List the type of graph that matches each description. 1.Uses Xs to display the data 2.Bars are used to compare the quantities of data 3.Data is listed in order from least to greatest in groups of 10s 4.Show how often an interval occurs