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g(x) stretches f(x) vertically by a factor of 3 (option B)
Explanation:[tex]f(x)=3log_{10}\text{ x}[/tex][tex]\begin{gathered} g(x)\text{ = 9}log_{10}\text{ x} \\ g(x)=3(3log_{10}\text{ x)} \end{gathered}[/tex]The transformation from f(x) to g(x):
[tex]\begin{gathered} \text{the function of f(x) was multiplied by a scale factor of 3 to get g(x)} \\ g(x)\text{ = 3f(x)} \end{gathered}[/tex]This shows a vertical stretch of 3
Hence, g(x) stretches f(x) vertically by a factor of 3 (option B)