Plz help with this problem

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.

Which representation has a constant of variation of -2.5

Find the zeros of each function. f(x) = 6x^2 - 7x - 20