Bell Ringer:Compare and contrast the temperatures of the cities below. (Type into ebackpack to make it easier.)

Graphs and Charts:Scatterplots, Line Graphs, Bar

Graphs, Histograms, Pie Charts

Lesson Essential Question:How can you use data displays to

compare two populations?

Bar Graphs, Double Bar Graphs,

Histograms

Definition

• Bar Graph- A graph that compares categories of data using bars.

Bar Graph

• Bar graphs compare values by using bars. • A bar graph is useful for comparing facts. The bars

provide a visual display for comparing quantities in different categories.

Directions of Bar Graphs

Bar Graph

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How Mrs. Kehoe Spends Her Day

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Think & Discuss

• Why don’t the bars of a bar graph touch?• You have 30 seconds• Because the intervals are NOT

continuous. Sleeping does not lead directly into working.

Double Bar Graph

• Definition- A Double Bar Graph compares categories of data for two sets of data.

Double Bar Graph

• Work with a partner!

Histograms

• Definition: A histogram is a graph that relates data shown in a frequency table.

• A histogram is similar to a bar graph but a histogram groups numbers into ranges.

Histogram vs. Bar Graph

• Histograms are a great way to show continuous data such as weight, height, and how much time.

• BUT, if your data is in categories (such as Country or Favorite Movie), then you should use a bar graph.

Histogram Example:

The histogram shows the heights of 21 students in a class, grouped into 5-inch groups.

How many students were greater than or equal to 60 inches tall?

Team Huddle

Team Mastery

Check Histogram Homework

Bar Graph/Double Bar Graph/Histogram Independent Practice

• ixl eighth grade• N.2 Interpret Bar Graphs

• Or

• ixl eighth grade• N.10 Interpret Histograms

Summary: 3 – 2 – 1

• Write 3 facts about bar graphs or double bar graphs.

• Write 2 facts about histograms• Write 1 similarity or difference between

bar graphs and histograms.