Student exploration: graphing skills gizmo

. 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.

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.

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 expectancy, but that was not the case.

(Too many McDonald’s to blame. ) 6. Challenge yourself: Hold a contest with your classmates.

Interpret: Which day was hottest? Wednesday Which day was coolest? Sunday 5. Apply: Try additional line graphs until you are comfortable making this type of graph. Discuss the most interesting graphs with your teacher and classmates.

Pie charts 6. Create graph: Pie charts are used to show proportional data. Under Graph type select Pie chart. Make sure that Show values and labels is checked. Write a title for the pie chart and drag the pie pieces to match the data table.

| | | | If necessary, click New until Studying and score data appears. | Goal: Create a scatter plot. 1. Create graph: Scatter plots are used to see if one variable is related to another. Each point on a scatter plot has two values.

For example, if Robert studied for 40 minutes and got a quiz score of 98, Robert’s point would be placed at (40, 98) on the graph. (You can think of that as “ over 40, up 98. “) To make a scatter plot, do the following: • Write a title for the graph. • Label the horizontal axis based on the second column of the data table, and the vertical axis based on the third column of the data table.

Score” scatter plot shows an example of a positive relationship—as one variable increases, so does the other. The points in this type of scatter plot tend to go “ uphill” from left to right. A negative relationship is the opposite—as one variable increases, the other variable decreases. These types of scatter plots go “ downhill” from left to right.

A. Which graphs in the Gizmo show a positive relationship? In the “ Income versus Education” graph, as one’s education improved and increased, the income they earned also increased. With the “ Study and Score Evaluation”, when one’s study time increased, the score also correlated with an increase.