Question

If a line passes through origin, then definitely is true

• A. a=0
• B. c=0
• C. b=0

Answer 1

The correct option is B c=0

In the general form of an equation $ax+by+c=0$, if c=0 then the equation becomes $ax+by=0$

Now notice that if we substitute x=0, we will definitely end up with y=0.

And the only point where x=0 and y=0 is the origin.