Question

On the coordinates plane xOy hatch a set of points whose coordinates satisfy the following inequalities in two variables x and y (show the boundary belonging to the set by a solid line and that not belonging to the set by a dash line).
$x+y⩽1,-x-y⩽1$

Answer 1

R.E.F image

$x+y\le 1$

R.E.F image

$-x-y\le 1$

Now Both lines are parallel

Required Region including boundary lines