For the equation $ax + by + c = 0$,if $c = 0$,then its graph is a line passing through the $\ldots \ldots \ldots$.

Any point on the line $y=x$ is of the form

Write whether the following statement is True or False. Justify your answer:
The graph of the linear equation $x + 2y = 7$ passes through the point $(0, 7).$

For the equation $F = (9/5)C + 32$,$F$ and $C$ are numerically equal when $F = \ldots$

State whether the following statement is True or False. Justify your answer:
The coordinates of points in the table:

$x$	$0$	$1$	$2$	$3$	$4$
$y$	$2$	$3$	$4$	$-5$	$6$

represent some of the solutions of the equation $x-y+2=0$.

If the point $(5, 2)$ lies on the graph of the equation $3x + 2y = k$,then $k = \ldots$