Line Graph Notes

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Line Graph Notes
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Warm Up 10/9

• What can we use a graph for?
• (What type of information can graphs tell usgive
  some examples!)

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Check your homework

• Correct your graph as we look over the homework
  together.

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Graphing Notes - Handout _____

• Fill in the blanks and examples as we go through
  the notes together.

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1. Title

• Write a title that explains your graph.
• Be sure it includes both the independent and
  dependent variables.
• Example The Effect of Light on Plant
  Height
• (Light
  IV) (Height - DV)
• Average Monthly High
  Temperature in C

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2. Axes

• Draw the Axes X and Y
• X axis is the independent variable
• Y axis is the dependent variable
• DRY Dependent/Responding -Y axis
• MIX Manipulated/Independent - X axis

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Axes
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3. Labels

• Both axes need to be labeled so the reader knows
  exactly what the IV and DV are.
• The dependent variable must be specific and
  include the units used to measure the data (such
  as number of drops cm, grams, etc.) Metric
  measurements only
• meter distance
• liter volume (how much of something in a
  container)
• gram mass (weight)

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• On which day did the driver travel the least
  amount of miles?
• What is the label on the X axis?
• What is gthe label on the Y axis?

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4. Key

• Make sure to include a key if you have more than
  one set of data.
• A key shows what each line represents.
• You can use colors, symbols, shading, or dotted
  lines to show the difference between different
  data sets on a key.

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5. Scale

• Decide on an appropriate scale for each axis.
  The scale refers to the minimum and maximum
  numbers on each axis. They may or may not begin
  at zero.
• The min and max numbers for the scale should be a
  little lower than the lowest value in the data
  and a little higher than the highest value in the
  data. This provides you with a larger frame to
  examine the graph.
• Once you have your highest and lowest numbers on
  the axes, evenly space out the intervals in
  between using a common number 1, 2, 5, 10, 25,
  100, etc.

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Do these graphs have the same data? Which is
better for analyzing the data?
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6. T.A.L.K.S. Title, Axis, Labels, Key, Scale

• A handy acronym to help you remember everything
  you need to create your graphs.
• Title Includes both variables IV DV
• Axis IV on X-axis and DV on Y-axis
• Label Both axes are labeled
• Key Identifies the data sets
• Scale Min and max values are appropriate

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7. Line Graphs

• Line graphs show a relationship between the two
  variables. They show how/if the IV affects the
  DV.
• Many times the IV plotted on the X axis is time
  (Line over Time)
• They are useful for showing trends in data and
  for making predictions.

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Tips

• Rulers must be used to draw axes and connect data
  points
• Data points should be small so they represent
  only 1 number
• A line may be placed over an existing line if it
  is representing the same data point(s) of the 1st
  line drawn

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Lets Try Some Practice!

• Complete the two graphs. Be careful about the
  scale you need to use to complete your graph.

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Exit Slip

• 3- Questions you still have about graphing
• 2- Things you learned about graphing
• 1- Thing youll remember about graphing

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