Mathematics
Grade 7
15 min
Create line plots
Create line plots
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify the key components of a line plot.
Organize raw numerical data for line plot construction.
Determine an appropriate number line scale for a given data set.
Accurately plot data points using 'X's (or dots) above a number line.
Construct a complete and correctly labeled line plot from a given set of numerical data.
Interpret basic patterns and distributions shown on a line plot.
Ever wondered how to quickly see patterns and frequencies in a list of numbers, like test scores or heights? 📊 Line plots are simple yet powerful tools that can help us do just that!
In this lesson, you'll learn step-by-step how to create line plots. We'll cover everything from organizing your data to drawing and labeling your plot, helping you visuali...
2
Key Concepts & Vocabulary
TermDefinitionExample
Line PlotA graph that displays the frequency of data along a number line, using 'X's or dots to represent each data point.A line plot showing how many students own 0, 1, 2, or 3 pets, with 'X's stacked above each number.
Data SetA collection of related numerical information that is being analyzed or displayed.The data set {7, 8, 7, 9, 6, 8, 7, 9} represents the scores of students on a quiz.
FrequencyThe number of times a particular data value appears in a data set.In the data set {5, 7, 5, 8, 6, 7, 5, 8}, the frequency of the number 5 is 3.
Number LineThe horizontal axis of a line plot, which represents the range of all possible data values.A line extending from 0 to 10 with evenly spaced tick marks, labeled 'Number of Books Read'.
Scale...
3
Core Formulas
Rule: Determine Data Range and Scale
Identify the minimum and maximum values in your data set. Based on these, and the precision of your data, choose an appropriate scale for your number line.
This step ensures your number line covers all data points and is easy to read. If your data has decimals (e.g., 0.5, 1.5), your scale should reflect that precision.
Rule: Construct the Number Line
Draw a horizontal number line. Mark and label the chosen scale, ensuring it extends from at least your minimum to your maximum data value.
The number line serves as the foundation of your plot. Make sure tick marks are evenly spaced and clearly labeled with the numerical values.
Rule: Plot Data Points
For each data value in your set, place an 'X' (or a dot) directly above its...
4 more steps in this tutorial
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Challenging
Which of the following data sets would create a line plot with a clear cluster between 5 and 7, and a gap at 8?
A.{1, 2, 3, 4, 5, 6, 7}
B.{5, 8, 8, 9, 10, 11}
C.{5, 5, 6, 7, 7, 9, 10}
D.{5, 6, 7, 8, 9, 10}
Challenging
A line plot shows the results of a 10-point quiz for 12 students. There is one 'X' at 6, two 'X's at 7, four 'X's at 8, three 'X's at 9, and two 'X's at 10. What is the total number of students who scored 8 or more on the quiz?
A.4
B.7
C.8
D.9
Challenging
During a science experiment, a student records the growth of a bean plant (in cm) each day for a week: 0.5, 0.5, 1.0, 1.5, 1.5, 1.5, 2.0. To create a line plot, the student draws a number line from 0 to 2 but only puts tick marks at 0, 1, and 2. Why is this an example of a 'Common Pitfall'?
A.The title is missing, which is the biggest error.
B.The chosen scale is incorrect because it cannot accurately represent the data points at 0.5 and 1.5.
C.There are too many data points to fit on a line plot.
D.The 'X's will be misaligned because the range is too small.
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