Question

If kx - 2ky + 15 = 0 passes through the point (3,-1), then k = -3.

• A. 3
• B. -3

Answer 1

The correct option is A

3

Putting x = 3 , y = -1 in the given equation,
k x 3 - 2 x k x -1 + 15 = 0
$\Rightarrow$ 3k + 2k + 15 = 0
$\Rightarrow$ k = -3