The equation of the lines passing through the origin and having slopes $3$ and $-\frac{1}{3}$ is
- A$3y^{2}+8xy-3x^{2}=0$
- B$3x^{2}+8xy+3y^{2}=0$
- C$3y^{2}-8xy-3x^{2}=0$
- D$3x^{2}+8xy-3y^{2}=0$
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