Student Exploration: Graphing Skills

Vocabulary: bar graph, line graph, negative relationship, pie chart, positive relationship, scale, scatter plot, variable

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

1. Four kinds of graphs are shown in this Gizmo. Circle the kinds you have seen before.

[pic][pic] [pic][pic]

Bar graph Line graph Pie chart Scatter plot

2. Where have you seen graphs used? Graphs are used everywhere. You can find them in textbooks, newspapers, meetings, schoolroom, everywhere. Basically anywhere someone needs to portray information, visualize data, display trends or patterns, compare two or more things, chart progression/digression, show relationships, etc.

3. Why do you think graphs are useful? Like stated above, graphs are useful to share information with others and put it in a picture-like form. Sometimes it is easier to understand a concept if you can visualize it, which is what a graph does.

Gizmo Warm-up: Using the Graphing Skills Gizmo

1. The Graphing Skills Gizmo™ starts with a bar graph on the right and a data set on the left. Practice using the Gizmo by doing the following:

• Write a title.

• Label the vertical and horizontal axes.

• Change the scale of the vertical axis.

• Drag the bars up and down.

2. Use the Graph type dropdown list to select other kinds of graphs. Practice with each type of graph:

• On the Line graph drag the points up and down.

• On the Pie chart change the size of each slice by dragging the edges.

• On the Scatter plot drag points from the data table to the graph.

|Activity A: |Get the Gizmo ready: |[pic] | | | | | |Bar graphs |On the Challenge menu, select Create graph. | | | |On the Graph type menu, select Bar graph. | | | |If necessary, click New until Animal speed data appears. | |

Goal: Build a bar graph based on a data table.

1. Create graph: A bar graph is useful for comparing things, such as how fast animals can run.

• Write a title for the graph. (Look at the title of the data table for a suggestion.)

• Label the horizontal axis and the vertical axis.

• Pick what you think is the best choice for a vertical axis scale.

• Drag each bar to match the data in the table. Do your best to estimate heights.

2. Check your work: Click Check to see how well you did.

A. What was your accuracy score? (Over 90 is excellent.) Accuracy score is 100.

B. What vertical scale did you choose? (In other words, how much does each horizontal line on the graph represent?) Each line on the graph represents 20 km/h. 3. Revise: Click Show value on mouseover. Move the cursor over each bar to see its value. Adjust each bar and click Check until the accuracy score is 100. To show your work, click the screenshot camera at upper left. Paste the screenshot into a blank document.

4. Interpret: Which of these animals is fastest? Cheetah Slowest? Human

5. Apply: Click New and make the next bar graph. Adjust the scale if needed and don’t forget to make a title and label each axis. Click Check to see your accuracy.

A. What country has the highest life expectancy? The lowest? Country with the highest life expectancy is Andorra. Country with the lowest is Zambia.

B. Does anything about the graph surprise you? I hoped that the USA would have the highest life...