The point on the parabola y2 = 18 x , for which the ordinate is three times the abscissa, is
(a) (6, 2)
(b) (–2, –6)
(c) (3, 18)
(d) (2, 6)
Correct option (d) (2, 6)
Explanation:
Let y = 3 x , then (3x)2 = 18 x
⇒ 9 x2 = 18 x ⇒ x = 2 and y = 6.
