An upgrade g1% is followed by a downgrade g2%. The equation of the parabolic curve of
length L to be introduced, is given by
(A) y = g [(g - g L] x²
(B) y = [(g g L] x²
(C) y = [(g - g L] x²
(D) y = [(g g L] x²
length L to be introduced, is given by
(A) y = g [(g - g L] x²
(B) y = [(g g L] x²
(C) y = [(g - g L] x²
(D) y = [(g g L] x²