Question

Which of the following lines passes through the origin?

• A. $x=2y+4$
• B. $y=x+3$
• C. $x=1$
• D. $y=x$

Answer 1

The correct option is D $y=x$

The coordinates of origin are $(0,0)$.
Among the options, if we substitute x = 0 and y = 0; $y=x$ is the only equation that satisfies it.
So, $y=x$ has $(0,0)$ as a solution.