How to Create Bar and Line Graphs
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How to Create Bar and Line Graphs

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  • But what does DRY MIX stand for in the first place?
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    How to Create Bar and Line Graphs How to Create Bar and Line Graphs Presentation Transcript

    • How to Create Bar and Line Graphs
    • Draw the Axes
    • Identify the Axes Y- Axis X- Axis
    • Identify the Axes Y- Axis X- Axis Dependent Variable (what is observed and measured) Independent Variable (what is changed by the scientist)
      • One way to remember which data goes on which axis is the acronym DRY MIX .
      • D.R.Y. M.I.X .
      • D - Dependent M - Manipulated
      • R - Responding I - Independent
      • Y - Y-axis X - X-axis
      DRY MIX
      • Write an appropriate title for the graph at the top.
      • The title should contain both the independent and dependent variables.
      Title
      • Decide on an appropriate scale for each axis.
      • The scale refers to the min and max numbers used on each axis. They may or may not begin at zero.
      • The min and max numbers used for the scale should be a little lower than the lowest value and a little higher than the highest value.
      • This allows you to have a smaller range which emphasizes the comparisons/trends in the data.
      Scale
    • Scale
      • The Y-axis scale is from 0-100.
      • The largest value though is only 35.
    • Scale
      • The Y-axis scale is now from 0-40.
      • This does a better job emphasizing the comparisons between coins.
      • Look at your minimum and maximum values you set up for both the Y and X-axis. (For most bar graphs, the X-axis will not have numerical values.)
      • Decide on an appropriate interval for the scale you have chosen. The interval is the amount between one value and the next.
      • It is highly recommended to use a common number for an interval such as 2, 5, 10, 25, 100, etc.
      Intervals
    • Intervals The interval for the Y-axis is 20. The X-axis does not have numerical data and does not need an interval.
      • Both axes need to be labeled so the reader knows exactly what the independent and dependent variables are.
      • The dependent variable must be specific and include the units used to measure the data (such as “number of drops”).
      Labels
    • Labels DV label IV label
      • Another handy acronym to help you remember everything you need to create your graphs…..
      • T.A.I.L.S.
      • T itle
      • A xis
      • I nterval
      • L abels
      • S cale
      TAILS
    • TAILS Title: Includes both variables Axis: IV on X-axis and DV on Y-axis Interval: The interval (4) is appropriate for this scale. Label : Both axes are labeled. Scale: Min and max values are appropriate.
    • Bar Graphs vs Line Graphs
    • Bar Graphs
      • Bar graphs are descriptive.
      • They compare groups of data such as amounts and categories.
      • They help us make generalizations and see differences in the data.
    • Example
    • Another example
    • 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.
      • They are useful for showing trends in data and for making predictions.
    • Example
    • Another example
    • Create-a-Graph Online!
      • Click here to use the online tool!