y - salário
x - quantidade de programas vendidos
Comp:
[tex]\boxed{y_1=3x_1+700}[/tex]
Soft:
[tex]\boxed{y_2=x_2+1100}[/tex]
I. Falso
[tex]x_1=600\ \therefore\ y_1=3(600)+700\ \therefore\ \boxed{y_1=2500}\\\\ x_2=600\ \therefore\ y_2=600+1100\ \therefore\ \boxed{y_2=1900}[/tex]
II. Verdadeiro
[tex]y_1=y_2\ \therefore3x+700=x+1100\ \therefore\ 2x=400\ \therefore\ \boxed{x=200}\\\\ x_1=201\ \to\ y_1=3(201)+700\ \therefore\ y_1=1303\\\\ x_2=201\ \to\ y_2=201+1100\ \therefore\ y_2=1301[/tex]
III. Falso
[tex]x_1=200\ \to\ y_1=3(200)+700\ \therefore\ \boxed{y_1=1300}\\\\ x_2=200\ \to\ y_2=200+1100\ \therefore\ \boxed{y_2=1300}[/tex]
Letra B.
