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 XX X X X X X X9 10 11 12 13 14 15 16 17 18 19 20

Homework Check ~WS: Reading Graphs

2. F3. B4. I5. C8. F9. D14. F18. G19. C

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 Colleges10987654321

Duke UNC NCSU NCCU Other

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

9007506004503001500 2.1-3.0 3.1-4.0 4.1-5.0 5.1-6.0

Class Notes: Bar Graphs & Histograms

Bar Graph Histogram

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.

Warm Up

Are these bar graphs or histograms? Explain how you know.

A. Students’ Shoe Size

86420 5-6 7-8 9-10 11-12 13-14B. Students’ Favorite

Jersey Number 86420 5 10 13 23 34 44 50

Exit Slip

Get out a scrap sheet of paper. In your own words, tell me what are

the differences between bar graphs and histograms.

Warm Up

In your own words, list the steps to making a histogram.

Migraine Histograms

Drug A161412108642 10-29 30-49 50-69 70-89 90-109 110-129

Drug B161412108642 10-29 30-49 50-69 70-89 90-109 110-129

Warm Up

List the type of graph that matches each description.

1. Uses Xs to display the data2. Bars are used to compare the

quantities of data3. Data is listed in order from least to

greatest in groups of 10s4. Show how often an interval occurs