The graph of $x+y=0$ passes through the origin and which quadrants?

State whether the following statement is True or False. Justify your answer:
The graph of every linear equation in two variables need not be a line.

Any point on the $y$-axis is of the form

Express the following linear equation in the form $ax + by + c = 0$ and indicate the values of $a, b$ and $c$ in each case:
$x = \frac{2}{5}y + 10$

At what point does the graph of the linear equation $x+y=5$ meet a line which is parallel to the $y$-axis,at a distance $2$ units from the origin and in the positive direction of the $x$-axis?

Write the linear equation such that each point on its graph has an ordinate $3$ times its abscissa.