meganeloise Posted February 18, 2009 Report Share Posted February 18, 2009 I always seem to use the wrong graph with the wrong values on axes when others would have been more appropriate and better for showing the data. How do I know which one to choose? grr! and how many different ones are there are which ones are good for what? D: D: D: Reply Link to post Share on other sites More sharing options...
moneyfaery Posted February 18, 2009 Report Share Posted February 18, 2009 For the sciences, usually polynomial and linear (polynomial to the 1st degree). Can you give an example of data i.e. what the variables are? So I can explain which graph should be used Reply Link to post Share on other sites More sharing options...
SharkSpider Posted February 19, 2009 Report Share Posted February 19, 2009 Unless you're dealing with decay or growth, polynomial or linear (or reciprocal) is almost always how it is. In general, IB asks you to find a linear relation, meaning that after examining data points and coming up with a formula (say y = x^1/3), then you plot another graph with adjusted error, and an attempt at a line (in this case, plot y against values for x cubed, and find a straight line) Once you find the gradient of that line, you have a constant and an intercept to analyze. Reply Link to post Share on other sites More sharing options...
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