line graph

Definition of Line Graph

  • Line graph is a graph that uses line segments to connect data points and shows changes in data over time.


More about Line Graph

  • Multiple Line Graph: Multiple line graph is a line graph that shows changes in data over time for more than one category.

Examples of Line Graph

  • The line graph shows the annual income of a person over a period of 7 years.


Solved Example on Line Graph

Irena recorded her test scores in a line graph as shown. What is Irena's score on the Math test?



A. 50

B. 80

C. 60

D. 40

Correct Answer: C


Step 1: The height of each point in the line graph represents Irena's score on the particular test.

Step 2: Note the height of the point representing Irena's score on the Math test.

Step 3: The height of the point is 60.

Step 4: So, Irena scored 60 on the Math test.

Related Terms for Line Graph

  • Data Points
  • Line Segment