Math. answer. please.

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

I’m stuck on this equation, anyone got the answer?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)