SOLUTION: a is directly proportional to b. If a=15, then b=9.

Algebra.Com
Question 1050066: a is directly proportional to b. If a=15, then b=9.
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
Let k represent the constant of proportionality
a = kb
a/b = k
15/6 = k = 5/2

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