Consider f(x)=log10(x)f(x) = \log_{10}(x)f(x)=log10(x) and g(x)=log10(x2)g(x) = \log_{10}(x^2)g(x)=log10(x2). How does the graph of g(x)g(x)g(x) compare to f(x)f(x)f(x) for x>0x > 0x>0?
g(x) is a horizontal stretch of f(x) by factor 2.
g(x) is a vertical stretch of f(x) by factor 2.
g(x) = f(x) + 2.
g(x) is identical to f(x) for all x.