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

 Apr 30, 2019
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Let the constant be k, because a and b are inversely proportional, a = k/b

4 = k/9

k = 36

a = k/b

a = 36/-72

a= -1/2

 Apr 30, 2019

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