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    I have to draw a graph to compare the predation of two species over time..

    This is the data I have:
    Asterionella: (no. colonies ml-1)
    Control = 12400
    6hr = 5100
    12hr = 7600

    Chlamydomonas: (no. cells ml-1)
    Control = 50200
    6hr = 33400
    12hr = 7500

    I have no idea which sort of graph is best to use as one is for colony count and one is for cells and I'm getting myself all in a muddle

    I initially did in in a bar chart form with a bar for each species next to each other with the time along the x-axis - is this the right format to use!? I just struggle with choosing the right sort of graph initally so any help in appreciated.
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    (Original post by chemsitrynightmare)
    I have to draw a graph to compare the predation of two species over time..

    This is the data I have:
    Asterionella: (no. colonies ml-1)
    Control = 12400
    6hr = 5100
    12hr = 7600

    Chlamydomonas: (no. cells ml-1)
    Control = 50200
    6hr = 33400
    12hr = 7500

    I have no idea which sort of graph is best to use as one is for colony count and one is for cells and I'm getting myself all in a muddle

    I initially did in in a bar chart form with a bar for each species next to each other with the time along the x-axis - is this the right format to use!? I just struggle with choosing the right sort of graph initally so any help in appreciated.
    Are you only given 3 sets of data for each species? If so then yeah, I think that a bar chart should do the job nicely.
    I would do, both controls together, and then 6hr, and 12hr - that would show a good comparison. Just make sure you use different colours (one for Asterionella and a different one for Chlamydomonas).
    Also don't forget the usual things like units, labelling of axis and a title
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    To draw a time graph a line graph would tell you the expected growth. X-axis would be time line and y would be count. Bar graph is only used to compare the difference at a point in time and not a trend.
 
 
 
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