iGCSE Biology Paper 3 - Please help?

Octavia

New member
quite often, I am required to draw a graph using given results.
For example, iGCSE Biology June 2009 Paper 3 - Q3a:
two variables: concentration of enzyme solution (%); time for past to flow out in seconds.

Am i to plot the time on the x or y axis (both axis are un-named, I have to label them)
 
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