7.2 Broken-Line Graphs
7.2 Broken-Line Graphs
Here you’ll learn what type of data can be represented on broken-line graphs, how to construct broken-line graphs,
and how to interpret other data from the finished graphs.
You’re driving to a family member’s house for a get-together. It’s 20 miles away and you’re traveling at a rate of
55 miles per hour. Once you get there you have dinner and socialize with family and friends for 45 minutes, then
you need to drive to the store and pick up some groceries. You get a little lost so you’re only traveling at 28 miles
per hour and the store is 15 miles the other direction on your way home. You arrive, pick up your groceries and talk
to the clerk which takes 10 minutes. Then you drive back the remaining 5 miles until you get home at a rate of 45
miles per hour. How would you chart this trip on a graph?
Watch This
First watch this video to learn about broken-line graphs.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter7BrokenLineGraphsA
Then watch this video to see some examples.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter7BrokenLineGraphsB
Guidance
A variation of a line graph is abroken-line graph. This type of line graph is used when it is necessary to show
change over time. A line is used to join the values, but the line has no defined slope. However, the points are
meaningful, and they all represent an important part of the graph. Usually a broken-line graph is given to you, and
you must interpret the given information from the graph.
Example A
Answer the questions below for the following broken-line graph, which shows the distance, over time, of a bus from
the bus depot.