Répondre :
1)a) poids = 100x(1.85 - 1 - ((1.85-1.5)/4)) = 76,25 kg
b) poids = 100x(1.73 - 1 - ((1.73-1.5)/2.5))= 63.8 kg
2) Non car on obtient un poids négatif
3) y = 100*(x-1-((x-1,5)/4)
=100x - 100 - ((100(x-1.5))/4)
=100x - 100 - (25(x-1.5))
=100x - 100 - 25x + 37.5
=75x - 62.5
4) 75 * 1.85 - 62.5 = 76.25kg
Donc ca correspond bien.