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Intro to Data: Line Plots
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 We'll learn how to display data on a line plot.
 We will also learn that a line plot is a lot like a number line!
 And we'll explore how this knowledge can help us compare the lengths of animals, how many goals we scored in a game, and how many pets we have!

Discussion Questions

Before VideoHow can you tell which answer was given the most times by looking at a tally sheet? ANSWER

It has the most tally marks.

Both have equallyspaced intervals. Both can be used to add, subtract, and show measurements.

Data is information we collect.

Yes, you can draw both a picture graph and a bar graph from a set of data.

How many siblings do you have? How many pets do you have? How many sports do you play?


After VideoYou collected the following data about the number of siblings of your classmates: 0, 1, 2, 1, 2, 4, 5. You want to plot the data on a line plot. What number should your number line begin on?ANSWER

The number 0.

Yes. I need to label every whole number between the endpoints. The gaps tell me about the data.

Most frequent measure, smallest measure, least number of things, largest measure, or greatest number of things.

A line plot is a number line that has dots or Xs above each number. The number line does not have dots or Xs.

I can count up the Xs or the dots.



Vocabulary

Number line
DEFINE
A line on which points are indicated by tick marks that are at regularlyspaced intervals from a starting point.

Data
DEFINE
Information that we have collected.

Line plot
DEFINE
Data along a number line with Xs or dots recorded above the tick marks to indicate the number of times a response appears in the data set.

Tick mark
DEFINE
A mark on the number line. Each mark represents a number.

Compare
DEFINE
To determine which number in a set of numbers is greater or greatest.

Labels
DEFINE
Information about a graph such as the title and units of measurement.

Number line
DEFINE

Reading Material
Download as PDF Download PDF View as Separate PageWHAT IS A LINE PLOT?A line plot is a type of graph that shows information on a number line. You can use a line plot to display data. Line plots can help you solve problems with your data.
To better understand line plots…
WHAT IS A LINE PLOT?. A line plot is a type of graph that shows information on a number line. You can use a line plot to display data. Line plots can help you solve problems with your data. To better understand line plots…LET’S BREAK IT DOWN!
Start building a line plot.
Information that we collect is called data. A line plot is a number line. The start number is the least number in your data. The end number is the greatest number in your data. Label all of the whole numbers in between. Now you are ready to add your data.
Start building a line plot. Information that we collect is called data. A line plot is a number line. The start number is the least number in your data. The end number is the greatest number in your data. Label all of the whole numbers in between. Now you are ready to add your data.Plot the number of pets on a line plot.
You asked your classmates how many pets they have. You make a line plot to show your data. The plot has a title: "Number of Pets." All of your classmates have between 0 and 4 pets. The number line should show the numbers 0, 1, 2, 3, and 4. Put an X over a number for each classmate who has that many pets. If Sam has 4 pets, put an X over the 4 for Sam.
Plot the number of pets on a line plot. You asked your classmates how many pets they have. You make a line plot to show your data. The plot has a title: "Number of Pets." All of your classmates have between 0 and 4 pets. The number line should show the numbers 0, 1, 2, 3, and 4. Put an X over a number for each classmate who has that many pets. If Sam has 4 pets, put an X over the 4 for Sam.Plot the number of soccer goals on a line plot.
You recorded the number of goals each teammate scored in soccer this year. You want to make a line plot to show your data. The plot has the title “Number of Goals Scored.” The least number of goals scored was 3. The greatest was 10. So, your line plot shows the numbers 3 to 10. Plot a point for each teammates' goals. You scored 5 goals, so put an X over the 5 for you!
Plot the number of soccer goals on a line plot. You recorded the number of goals each teammate scored in soccer this year. You want to make a line plot to show your data. The plot has the title “Number of Goals Scored.” The least number of goals scored was 3. The greatest was 10. So, your line plot shows the numbers 3 to 10. Plot a point for each teammates' goals. You scored 5 goals, so put an X over the 5 for you!Interpret your soccer goal line plot.
A line plot tells us lots of different information. The soccer goals line plot tells you that every player scored 3 or more goals. One player scored 10 goals. The most common number of goals was 7 since it has the most Xs above it.
Interpret your soccer goal line plot. A line plot tells us lots of different information. The soccer goals line plot tells you that every player scored 3 or more goals. One player scored 10 goals. The most common number of goals was 7 since it has the most Xs above it.Plot the length of geckos on a line plot.
You measured the length of each gecko in a tank. You make a line plot of all of your data. After you make your line plot, you notice that there are no points over 15. This means that no gecko in the tank is 15 cm long. There are 2 points above 21. So 2 geckos in the tank are 21 cm long.
Plot the length of geckos on a line plot. You measured the length of each gecko in a tank. You make a line plot of all of your data. After you make your line plot, you notice that there are no points over 15. This means that no gecko in the tank is 15 cm long. There are 2 points above 21. So 2 geckos in the tank are 21 cm long. 
Practice Word Problems

Practice Number Problems

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What end points would you use for a line plot of the following data?
Give students a line plot. Ask, ”How many measurements were made?”
You took a survey of the ages of people who were in the community library one day. There was one 15yearold, one 16yearold, two 17yearolds, and three 20yearolds. Do you need to include 18 on a line plot of the data, even though no student at the library was 18 years old?
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