Question

Equation of a line through the origin and perpendicular to, the line joining (a, 0) and (– a, 0), is.

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

Answer 1

Answer: (B)

$x = 0$

Answer 2

The required equation passing through (0, 0) and its gradient is $m = \frac { 1 } { 0 }$ , is $y = \frac { 1 } { 0 } x \Rightarrow x = 0$ .