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Anthony a une moyenne (v) de 11,33 (note arrondie au centième le plus proche).
Sur la calculatrice, n représente la somme totale des coefficients de pondération.
n = 1 + 0.5 + 1 + 0.5.
Gx représente la somme pondérée des notes de l'élève.
(12)(1) + (13)(0.5) + (10)(1) + (11)(0.5) = 34.
Modifiez la dernière note d'Anthony de 11 à 15.
v $ $ $ 15 <
% u 2
$ " " < <
Si le professeur ajoute 4points au 4e contrôle, la moyenne d'Anthony passe à 12.
³ Activité
Le tableau ci-dessous présente les résultats d'une série d'essais de freinage.
du test 1 2 3 4
Vitesse (km/h) 33 49 65 79
Distance de freinage (m) 5,30 14,45 20,21 38,45
En utilisant la relation entre la vitesse et la distance de freinage, calculez la distance
de freinage nécessaire à un véhicule se déplaçant à 55 km/h.
Un nuage de points tracé à la main à partir de ces données suggère un relation
linéaire. La calculatrice utilise la méthode des moindres carrés pour calculer la droite
de régression, y'=ax'+b, à partir des données saisies dans les listes.
v v $ $ $
<
33 $ 49 $ 65 $ 79 $ " 5.3 $ 14.45
$ 20.21 $ 38.45 <
Fonctions mathématiques 39
43


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