Question

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)

Answer 1

Correct option  (d) (2, 6)

Explanation:

Let y = 3 x , then (3x)² = 18 x

⇒ 9 x² = 18 x ⇒ x = 2 and y = 6.