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[tex]\boxed{\begin{array}{l}\underline{\rm intersecc_{\!\!,}\tilde ao~da~reta~com~o~eixo~y\!:}\\\sf x=0\\\sf y=3\cdot0-1\\\sf y=-1\implies A(0,-1)\\\underline{\rm intersecc_{\!\!,}\tilde ao~da~reta~com~eixo~x\!:}\\\sf y=0\\\sf 3x-1=0\\\sf 3x=1\\\sf x=\dfrac{1}{3}\implies B\bigg(\dfrac{1}{3},0\bigg)\\\tt o~gr\acute afico~est\acute a~anexo.\end{array}}[/tex]
