GRASPING GRAPHING

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GRASPING GRAPHING
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• Graphs are visual representations of data you
  collect in an experiment.
• There are many types of graphs including bar,
  line, scatter plot, histogram, circle (pie), stem
  and leaf
• The most commonly used graphs in science are bar
  graphs, line graphs, and scatter plots.

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BAR AND LINE GRAPHS/ SCATTER PLOTS
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• A bar graph is used for comparing data quickly
  and easily and shows distribution of data between
  groups.
• A line graph is best used for looking at changes
  over time and predicting outcomes.
• Scatter plots are used to compare two sets of
  data.

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SETTING UP YOUR GRAPH

• Set up your graphs with an x-axis and a y-axis.
  The x-axis is horizontal, and the y-axis is
  vertical.
• The x-axis represents the independent variable.
• The y-axis represents the dependent variable.

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Title
Y axis
Individual axis labels
X axis has a label
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Principal Skinner wants to see if the amount of
sunlight affects the average height of his
tulips. He exposes his flowers to various amounts
of sunlight, and uses intervals of 0,10, 20, 30,
etc. hours of sunlight.
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• Principal Skinner wants to know how high the
  tulip would be when exposed to 46 hours of
  sunlight. He can interpolate the answer by
  finding 46 hours on the x-axis.
• If Principal Skinner wanted to know how tall the
  plants would be after 100 hours of sunlight, he
  could extrapolate by following the general
  pattern of the graph.

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SCATTERPLOT

• Line of Best Fit
• Strong correlation
• Weak correlation
• Zero Correlation
• Positive Correlation
• Negative Correlation

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PIE GRAPHS
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