Slide 1
Creating a Line Plot
The data on the heights of the football players can be displayed using a line plot.
Description of data table: A two-column data table is displayed. The left column is labeled “Player” and contains the names of twelve football players: Ray Rice, Haloti Ngata, Torrey Smith, Michael Oher, Jacoby Jones, Joe Flacco, Ed Dickson, Justin Tucker, Rick Wagner, Jeromy Miles, Albert McClellan and Terrence Cody. The right column is labeled “Height in Feet” and contains the heights of the football players. These heights are, in feet, five and one-half, six and one-fourth, six, six and one-fourth, six and one-eighth, six and one-half, six and one-fourth, six, six and one-half, six and one-eighth, six and one-eighth, and six and one-fourth.
(text on slide) Follow these steps to create a line plot.
First, start with a number line that extends from the minimum data value to the greatest data value (at least).
For the football players’ data, what is the height of the shortest player?
What is the height of the tallest player? (fill in the box)
Correct Answers: 5 ½, 6 ½
Slide 2
Here is a number line that will accommodate the range of heights in our data.
Description of number line: A number line is shown. It extends from five to seven, counting in increments of one-eighth.
Description of data table on the right of the screen: A two-column data table is displayed. The left column is labeled “Player” and contains the names of twelve football players: Ray Rice, Haloti Ngata, Torrey Smith, Michael Oher, Jacoby Jones, Joe Flacco, Ed Dickson, Justin Tucker, Rick Wagner, Jeromy Miles, Albert McClellan and Terrence Cody. The right column is labeled “Height in Feet” and contains the heights of the football players. These heights are, in feet, five and one-half, six and one-fourth, six, six and one-fourth, six and one-eighth, six and one-half, six and one-fourth, six, six and one-half, six and one-eighth, six and one-eighth, and six and one-fourth.
Slide 3
Here is how the line plot would look for the first four players in our data.
Description of number line: A number line is shown. It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. One dot is plotted above six. Two dots are plotted above six and one-fourth.
Description of data table on the right of the screen: A two-column data table is displayed. The left column is labeled “Player” and contains the names of four football players: Ray Rice, Haloti Ngata, Torrey Smith and Michael Oher. The right column is labeled “Height in Feet” and contains the heights of the football players. These heights are, in feet, five and one-half, six and one-fourth, six, and six and one-fourth.
Notice how there are two dots above six and one-quarter. This is because there are two players, Oher and Ngata, who are six and one-quarter feet tall.
Slide 4
Complete the dot plot for the remaining players. Drag the points to the correct location on the line plot.
Description of number line: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. One dot is plotted above six. Two dots are plotted above six and one-fourth.
Description of data table on the right of the screen: A two-column data table is displayed. The left column is labeled “Player” and contains the names of the remaining eight football players: Jacoby Jones, Joe Flacco, Ed Dickson, Justin Tucker, Rick Wagner, Jeromy Miles, Albert McClellan and Terrence Cody. The right column is labeled “Height in Feet” and contains the heights of the football players. These heights are, in feet, six and one-eighth, six and one-half, six and one-fourth, six, six and one-half, six and one-eighth, six and one-eighth, and six and one-fourth.
Description of activity:
Below the number line are eight points that are to be dragged to the appropriate location in the dot plot.
Correct Answer: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. Two dots are plotted above six. Three dots are plotted above six and one-eighth. Four dots are plotted above six and one-fourth. Two dots are plotted above six and one-half.
Slide 5
Now, it is much easier to see how the heights of the Ravens football players relate. Immediately we can see that the majority of the players in our data are between 6 feet and six and one quarter feet tall. It is also interesting to note how, at five and one-half feet, Ray Rice is significantly shorter than the other players.
Description of image: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. Two dots are plotted above six. Three dots are plotted above six and one-eighth. Four dots are plotted above six and one-fourth. Two dots are plotted above six and one-half.
Slide 6
Use the line plot to answer the following questions.
Description of image: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. Two dots are plotted above six. Three dots are plotted above six and one-eighth. Four dots are plotted above six and one-fourth. Two dots are plotted above six and one-half.
(text on slide) What is the difference in the height of the tallest Ravens player in the survey and the shortest Ravens player in the survey?
Description of quiz area:
Four answer choices are given:
Correct Answer: A
Slide 7
Assume that wearing football cleats adds one-quarter of a foot to a player’s height. How will the line plot change if the players’ heights are measured with their cleats on?
Description of image: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. Two dots are plotted above six. Three dots are plotted above six and one-eighth. Four dots are plotted above six and one-fourth. Two dots are plotted above six and one-half.
Description of quiz area: Four answer choices are given:
Correct answer: B
Slide 8
What affect would there be on the data if one player left his helmet on during the height measuring?
Description of image: A number line is shown, labeled “Height of Football Players in Feet.” It extends from five to seven, counting in increments of one-eighth. One dot is plotted above five and one-half. Two dots are plotted above six. Three dots are plotted above six and one-eighth. Four dots are plotted above six and one-fourth. Two dots are plotted above six and one-half.
Description of quiz area: Four answer choices are given:
Correct answer: C
Slide 9
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