why ni Q sio upande wa the other, ikiwa tutashuka (South) kutoka w(2:h) ere dh/dx ni 0 than pia h which punguza kifaa(2:h)t? Ninamaanisha dh/dy < 0 kwa both pointi right? w(2:h)y kwa t(2:h)e ya juu pekee?####[['Q', 'Mathematical_Related_Concept', 'NEU'], ['h', 'Mathematical_Related_Concept', 'NEU'], ['dh/dy < 0', 'Mathematical_Related_Concept', 'NEU'], ['dh/dx', 'Mathematical_Related_Concept', 'NEU']]