For what point of the parabola the ${y^2} = 18x$ ordinate equal to three times the abscissa?
A point on parabola ${y^2} = 18x$ at which the ordinate increases at twice the rate of the abscissa is:
$A.\left( {\dfrac{9}{8},\dfrac{9}{2}} \right) \\ B.\left( {2, - 4} \right) \\ C.\left( {\dfrac{{ - 9}}{8},\dfrac{9}{2}} \right) \\ D.\left( {2,4} \right) \\$