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how many minutes

In a psychological study it was found that the number of nonsense words a college student can remember varies inversely with the time that has elapsed before the student is asked to recall the nonsense words. A typical student is able to remember 7 nonsense words after 10 minutes. How many minutes must elapse for a typical student to remember only 5 nonsense words? Show work.

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
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n - Number of nonsense words to remember after a certain minutes of time.
 m - number of minutes taken to remember certain none sense number of words.
 
n = k /m
 
7 = k/10
 
k = 70
 
5 = 70/ m
 
  m = 14 minutes