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Reading Line Graphs

3.MD.B.3
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Aligned To Common Core Standard:

Grade 3 Measurement - 3.MD.B.3

How to Read a Line Graph - A visual method for the representation of data is known as a line graph. Line graphs represent two or more data sets as well as their relation with each other. Basically, line graphs are pictures that tell us how one thing changes when in relation with another. Reading graphs is easy! It requires an interpretation of which information pieces fit with each other. Here are a few steps that will help you read a line graph! The first step is to identify what the line graph represents. Line graphs usually have a clearly sketched x-axis along the horizontal and y-axis along the vertical line. Check the scale. The increase in the values and decrease is represented along the y-axis. You will easily understand which value is bigger and which value is lesser by taking a look at the scale. Now, locate the element that you need to find information on. Values such as time, months, days, etc. are listed along the y-axis, so you can easily read through the y-axis. Once you have found your desired answer, you are done! Students can use these lessons and worksheets to learn how to read and interpret line graphs and trends in them.

Printable Worksheets And Lessons




Homework Sheets

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  • Homework 1 - The line graph shows the number of cell phones (of a particular style) sold during six months of a year. Study the line graph and answer the following questions.
  • Homework 2 - You will interpret a graph on stock prices over a period of years. The questions are like: What was the value of stock in 2003? In which year was the stock at its highest value?
  • Homework 3 - How many children voted for milk? That is a type of chocolate.



Practice Worksheets

One graph followed by many questions.

  • Practice 1 - The line graph shows the number of motorcycles sold over several years.
  • Practice 2 - Which food do most of the children like? Which is the second most popular food?
  • Practice 3 - Read the graph of tablet sales over a half of year at the store. How many tablets were sold in April?



Math Skill Quizzes

Did you know that an Imotional movie is a really thing? Steve Jobs pioneered his own genre.

  • Quiz 1 - Which food do most people like? Which is the second most popular food?
  • Quiz 2 - Which type of movies do most students like? What is the second most popular movie format?
  • Quiz 3 - We look at the popularity of fruit and foods that other people make. Which is the second most popular cuisine?


Reading Graphs Is Important, But Focus on The Purpose

As we explored above, reading graphs is a skill that can be learned through practice. It is not the most difficult of skills but making sense of graphs to identify a trend or to spot some anomaly can be a bit more challenging. In general, we use graphs to locate relationships between variables. In the case of a line graph, we are just evaluating the interaction of two variables. Besides the line itself, you should also see what the position tells you. Is it increasing or decreasing over time? Are there some pieces of data that just seem completely out of place? These are called outliers. In some case, they were just poor measurements or times that were just so different from the norm, that it did not fit. In many cases you will need to evaluate a series of graphs to make sense of a situation. The more data you evaluate the easier it will be to grasp some information and make a valid inference from the information that is available to you. There are many different forms of spreadsheet software that can help you create these things but making sense of the data is up to you. The more practice you get with the skill, the easier it becomes.