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    hi, in a biology exam if it asks you to describe the relationship between two variables in a table, say X and Y, and X increases when Y increases (for one mark), is it acceptable just to say "X increases when Y increases" or do you have to say "X is proportional to Y" to get the mark?


    Yes it would probably be sufficient to say X increases when Y increases. With tables/graphs like that I usually say X increases WITH Y (but it means the same thing anyway so should be okay). If the question asks you to describe the table/graph, you just have to describe the relationship between the variables, you won't usually need to go into ratios, proportions etc.


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