lesson 5: interpreting line graphs. where have you used/seen line graphs before?
TRANSCRIPT
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Lesson 5: Interpreting Line Graphs
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Where Have You Used/Seen Line Graphs Before?
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What is a Line Graph???
• Used to show trends in data OVER TIME• Points are plotted and a line is drawn to connect the
points• EVERY POINT ON THE LINE SHOULD HAVE A
VALUE!!!• All line segments must be the SAME LENGTH!
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What Do You See in this Line Graph?
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Independent and Dependent Variables
• Independent (Controllable) Variable - X variable – Located on X-axis - YOU control this - ex: Time, Months of the year
• Dependent (Uncontrollable) Variable - Y variable – Located on Y-axis - You CANNOT control this - ex: Temperature
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Attributes of a Line Graph• What are attributes? - A collection of things needed in order for something to
happen - ex: Cars, Sports
• ATTRIBUTES NEEDED WHEN DEALING WITH LINE GRAPHS!!!
- Title - Axis (X and Y) - Intervals (Range of #s, ex: 1-5) - Scale (Appropriate one needed) - Skew – Inappropriate scale used - Misleads information (Graph may look too big
or too small because scale is too big or too small
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Different Ways to Show Line Graph Data
• Continuous Data - The points on a graph are JOINED - “Connect the dots” - Every point is meaningful
• Discrete Data - Points are NOT JOINED - Every single point is not relevant - ex: DVD sales
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What is a Table of Values?
• A table that contains data “values”
• Shows trends/relationships about data
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Example
See Handout!!!
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Create a Line Graph From the Following Table of Values
SEE HANDOUT GIVEN TO YOU BY MR. DOUCETTE!!!
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Create a Table of Values from the Line Graph
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What Relationships Do You See in the Graphs/Table of Values???
• What do I mean by relationships? - Comparing the data to show trends over
time
• What are the graphs showing?• What questions can be answered by
looking at the graphs?• Are there any patterns you see from the
data?
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Make a Line Graph
• How much sleep did you get last week?
• Put the data in a table of values then construct a line graph based on your findings!
• What conclusions can you make based on your data?
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Journal Writing
• Where do we see patterns in everyday life? Explain
- Ex: Nature, clothing etc.
• Why/Why didn’t you like our Twister game? Explain
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Questions!!!
• Do together: A-G page 127
• Questions 1-5 page 129