Diagram + question is in a picture in the following link:
https://www.google.ca/search?q=the+following+graph+shows+two+different+stresses+on+the+reaction&espv=2&biw=667&bih=639&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiov_KXoP3KAhXhlIMKHQ5wApwQ_AUIBigB&dpr=1#imgrc=xZYgaWuNELufyM%3A
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