November 2019 1 104 Report
Considere duas grandezas representadas pelas letras x e y. Identifique quais das relaçoes a seguir indicam uma proporçao direta entre x e y

a) y = 7.x

b) y = 3x + 10

c) y = x

d) y = -2x -9

e) y = -5x
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