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GradePosition of a Point with respect to a Parabola

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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) \\

\]

\[

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) \\

\]

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