1. 6-4
Bar Graphs
Course 1
Warm Up
Problem of the Day
Lesson Presentation

2. Use the following data set. 45 55 58 63 63 37 76 46 34
Warm Up
Use the following data set.
What is the mean of the data?
2. What is the median of the data?
3. What is the mode of the data?
Add up all the numbers then divide by how many numbers you have
Put the numbers in order from least to greatest then find the number in the middle
Add up all the numbers then divide by how many numbers you have

3. Warm Up
Use the following data set.
1. What is the mean of the data?
2. What is the median of the data?
3. What is the mode of the data? 53 55 63

4. Vocabulary
bar graph
double-bar graph

5. A bar graph can be used to display and compare data
A bar graph can be used to display and compare data. A bar graph displays data with vertical or horizontal bars.

6. Additional Example 1A: Reading a Bar Graph
Use the bar graph to answer each question.
Which biome in the graph has the least average summer temperature?
The coniferous forest has the least average summer temperature.

7. Additional Example 1B: Reading a Bar Graph
Use the bar graph to answer each question.
Which biomes in the graph have an average summer temperature of 30C or greater?
The grassland and the rain forest have average summer temperatures of 30C or greater.

8. Check It Out: Example 1A
Use the bar graph to answer each question.
Which biome in the graph has the highest average summer temperature?
The rain forest has the highest average summer temperature.

9. Magazine Subscriptions Sold
Additional Example 2: Making a Bar Graph
Use the given data to make a bar graph.
Step 1:Find an appropriate scale and interval. The scale must include all of the data values. The interval separates the scale into equal parts.
Magazine Subscriptions Sold
Grade 6
Grade 7
Grade 8
258
597
374
Step 2:Use the data to determine the lengths of the bars. Draw bars of equal width. The bars cannot touch.
Step 3: Title the graph and label the axes.

10. A double-bar graph shows two sets of related data.

11. Understand the Problem
Additional Example 3: Problem Solving Application
Make a double-bar graph to compare the data in the table.
Club Memberships
Club
Art
Music
Science
Boys 12 6 16
Girls 8 14 4 1
Understand the Problem
You are asked to use a graph to compare the data given in the table. You will need to use all of the information given.

12. Additional Example 3 Continued
Solve 3
Determine appropriate scales for both sets of data.
Use the data to determine the lengths of the bars. Draw bars of equal width. Bars should be in pairs. Use a different color for boy memberships and girl memberships. Title the graph and label both axes.
Include a key to show what each bar represents.

13. Use the bar graph to answer each question.
Lesson Quiz: Part 1
Use the bar graph to answer each question.
1. Which animal was least popular among students?
2. Which pet was more popular to twice as many students as rabbits were?
Student Pet Survey

14. Lesson Quiz: Part 2
3. Make a bar graph of this data.
Number of Daily Servings
Grains = 6
Fruit = 2
Meat = 2
Milk = 3
Vegetables = 3

15. Use the bar graph to answer each question.
Lesson Quiz: Part 1
Use the bar graph to answer each question.
1. Which animal was least popular among students?
2. Which pet was more popular to twice as many students as rabbits were?
Student Pet Survey
bird
dog

16. Lesson Quiz: Part 2
3. Make a bar graph of this data.
Number of Daily Servings
Grains = 6
Fruit = 2
Meat = 2
Milk = 3
Vegetables = 3