Question

The equation of a diameter of circle $x ^ { 2 } + y ^ { 2 } - 6 x + 2 y = 0$ passing through origin is.

• A. $x + 3 y = 0$
• B. $x - 3 y = 0$
• C. $3 x + y = 0$
• D. $3 x - y = 0$

Answer 1

Answer: (A)

$x + 3 y = 0$

Answer 2

Centre (3, –1). Line through it and origin is

$x + 3 y = 0$.