A point an the parabola y^(2)=18x at whi...

A point an the parabola `y^(2)=18x` at which the ordinate increases at twice the rate of the abscissa is :

(2, 4)

(2, -4)

`(-(9)/(8), (9)/(2))`

`((9)/(8), (9)/(2))`

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