Observe atentamente o gráfico abaixo: *
y=-2x-4
y=-2x+6
y=6x+4
y=-6x-4

[tex]\boxed{\begin{array}{l}\sf o~gr\acute afico~passa~pelos~pontos\\\sf A(0,6)~B(3,0)\\\sf\dfrac{x}{3}+\dfrac{y}{6}=1\cdot6\\\sf2x+y=6\\\blue{\sf y=-2x+6\checkmark}\end{array}}[/tex]