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

Warm Up Use the following data set. 45 55 58 63 63 37 76 46 34 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

Problem of the Day The distance around the bases is 4  90 feet. How many runs does a baseball team need to score before the scoring base runners have covered a mile? (1 mile = 5,280 feet) 15 runs

Learn to display and analyze data in bar graphs.

Vocabulary bar graph double-bar graph

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.

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? Find the lowest bar. The coniferous forest has the least average summer temperature.

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? Find the bar or bars whose heights measure 30 or more than 30. The grassland and the rain forest have average summer temperatures of 30C or greater.

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

Check It Out: Example 1B Use the bar graph to answer each question. Which biomes in the graph have an average summer temperature of 25C or greater? Find the bar or bars whose heights measure 25 or more than 25. The deciduous forest, the grassland, and the rain forest have average summer temperatures of 25C or greater.

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.

Use the given data to make a bar graph. Check It Out: Example 2 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. Tickets Sold Grade 6 Grade 7 Grade 8 310 215 285 Grade 6 Grade 7 Grade 8 Tickets Sold Grade Tickets 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.

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

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.

Additional Example 3 Continued 2 Make a Plan You can make a double-bar graph to display the two sets of data.

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.

Additional Example 3 Continued 4 Look Back You could make two separate graphs, one of boy memberships and one of girl memberships. However, it is easier to compare the two data sets when they are on the same graph.

Understand the Problem Check It Out: Example 3 Make a double-bar graph to compare the data in the table. Club Memberships Club Band Chess Year Book Boys 9 14 16 Girls 11 7 15 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.

Check It Out: Example 3 2 Make a Plan You can make a double-bar graph to display the two sets of data.

Check It Out: 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. Club Memberships Memberships Club

Check It Out: Example 3 Continued 4 Look Back You could make two separate graphs, one of boy memberships and one of girl memberships. However, it is easier to compare the two data sets when they are on the same graph.

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

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