Graph: "distance from plant(cm)" vs "number of O2 bubbles produced" would it be line or bar chart
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Graph: "distance from plant(cm)" vs "number of O2 bubbles produced" would it be line or bar chart

[From: ] [author: ] [Date: 12-05-28] [Hit: ]
yes, although number of bubbles is discrete, this is your dependent variable so it goes on the y axis.The independent variable distance from plant is a continuous variable, and goes on the x axis. What really matters in graph-drawing is what type of variable is it on the x axis,......
Doing some biology work and need to plot a graph "distance from plant(cm)" vs "number of bubbles produced". It's actually an investigation into how light intensity affects the rate of photosynthesis and we are just changing how far away a lamp is from an Elodea plant and then we count the number of oxygen bubbles produced. Number of bubbles produced is discrete, so I would assume that it would be a bar chart, however to me it seems like a line graph would be more appropriate. So which graph would I use and why?

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It would be a line graph - but I can see why you'd think it would be a bar chart instead!
I'll do my best to explain... yes, although 'number of bubbles' is discrete, this is your dependent variable so it goes on the y axis.
The independent variable 'distance from plant' is a continuous variable, and goes on the x axis. What really matters in graph-drawing is what type of variable is it on the x axis, because the y axis just depends on the x.

Hope that helps, and wasn't too confusing! :)

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Use a line graph - since you are not using discrete categories.
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