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Constructing a Graph

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Constructing a Graph ... Practice Graphing Go ... Complete Practice Interpreting Data #1-10 Complete Tadpole population A line graph may be made in Microsoft Excel or ... – PowerPoint PPT presentation

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Title: Constructing a Graph


1
Constructing a Graph
  • Unit 1
  • Most common Line Graph

2
1. ID Variables
  • Independent Variable
  • Goes on the X axis (_________)
  • Should be on ________side of data table.
  • Dependent Variable - (changes w/ IV)
  • Goes on the Y axis (________)
  • Should be on _______side of data table.

3
2. Determine Variable Range
  1. Subtract the lowest data value from the highest
    data value.
  2. Do each variable separately.

4
3.Determine Scale of Graph
  1. Determine a scalenumerical value for each
    square,best fits range of each variable
  2. Spread graph to use MOST available space.

5
Number and Label Each Axis
  1. This tells what data the lines on your graph
    represent.

6
Plot the Data Points
  1. Plot each data value on the graph with a dot.
  2. You can put the data number by the dot, if it
    does not clutter your graph.

7
Draw the Graph
  • Draw a curve or a line that best fits the data
    points.
  • Most graphs of experimental data are not drawn as
    "connect-the-dots".

8
Title the Graph
  1. Your title should clearly tell what the graph is
    about.
  2. If your graph has more than one set of data,
    provide a "key" to identify the different lines.

9
BAR Graphs
  1. If either dependent (DV) or Independent (IV)
    variable are NON-numeric (qualitative)
  2. Used to compare things btwn different groups
  3. If there is gt1 set of data you need to have more
    than one bar

10
CIRCLE (PIE) Graphs
  1. If both DV and IV are NON-numeric
  2. Use when DV or IV is in or when comparing PARTS
    to a WHOLE
  3. Should be presented in order, largest to
    smallest, to make it easier to interpret figures

11
LINE Graphs
  1. If BOTH DV and IV are numbers (quantitative)
  2. Show a trend or change over time
  3. If gt1 set of data? you need gt1 line

12
Practice Graphing
  • Go to www.teacherweb.com
  • Click Student and Parent
  • Click Find Teacher-Follow Drop Down Menus
  • Open Constructing a Graph PP
  • Click here on Practice Graphing Here

13
In groups
  • Complete Practice Interpreting Data 1-10
  • Complete Tadpole population
  • A line graph may be made in Microsoft Excel or at
    Create a Graph
  • Print Graph and hand in with group paper
  • 1 paper is to be handed in for the whole group!
    Must have each name on paper!
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