Section 3.5: Relationships

ContourPlot[x^2+y^2==25,{x,-5,5},{y,-5,5}]

ContourPlot[x^3+y^3==6x y,{x,-5,5},{y,-5,5}]

ContourPlot[y Cos[x]==1 + Sin[x y],{x,-10,10},{y,-10,10}]

ContourPlot[Sqrt[x y] == 1 + x^2y,{x,-10,10},{y,-10,10}]

ContourPlot[9x^2+y^2==9,{x,-5,5},{y,-5,5}]

ContourPlot[x^6+CubeRoot[y] ==1,{x,-10,10},{y,-10,10}]

ContourPlot[8y+x^2y^3==24,{x,-10,10},{y,-10,10}]