Describe the surface in

$3$

represented by the equation

x $+$ y $=2.$

This is the set

$\{($x$,2$ x$,$ z$)|$x in $,$ z in $\}$

which is a vertical plane that intersects the xz$-$plane in the line

y $=2$ x$,$ z $=0.$

This is the set

$\{($x$,2$ x$,$ z$)|$x in $,$ z in $\}$

which is a horizontal plane that intersects the xz$-$plane in the line

y $=2$ x$,$ z $=0.$

$$This is the set

$\{($x$,2$ x$,$ z$)|$x in $,$ z in $\}$

which is a vertical plane that intersects the xy$-$plane in the line

y $=2$ x$,$ z $=0.$

This is the set

$\{($x$,2$ x$,$ z$)|$x in $,$ z in $\}$

which is a horizontal plane that intersects the xy$-$plane in the line

y $=2$ x$,$ z $=0.$

This is the set

$\{($x$,$ y$,2$ x $$ y$)|$x in $,$ y in $\}$

which is a vertical plane that intersects the xy$-$plane in the line

y $=2$ x$,$ z $=0.$