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

The correct option is A y = 0

The general equation of the line passing through the origin is given by y=mx.
It also passes through the midpoint of (a,0) and (-a,0) which is (0,0).
So the equation of the required line is y=0.