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Suppose that a is inversely proportional to b. If a = 4 when b = 9, find a when b = -72.

 Apr 21, 2020
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Inversely proportional    means    a = k/b       (directly proprtional would be  a = kb)

4 = k 9    results in k =  4/9

 

a = 4/9 b     put in b = -72   then calc 'a'

a = 4/9 (-72)       results in a = -32

 Apr 21, 2020

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