9514 1404 393
Answer:
 1.048
Explanation:
The generic form of the exponential model is ... 
 y = a·b^x
Filling in the given values, we have ...
 100 = a·b^6
 184 = a·b^19
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Dividing the second equation by the first gives ...
 184/100 = (a·b^19)/(a·b^6)
 1.84 = b^13 . . . . . simplify
 b = 1.84^(1/13) ≈ 1.048022 . . . . find the 13th root
The growth factor is about 1.048.