The area of the feasible region for the following constraints $3y+x\ge 3, x\ge 0, y\ge 0$ will be

The constraints

$-x_1+x_2\le 1$

$-x_1+3x_2\le 9$

$x_1, x_2\ge 0$ defines a

Shaded region is represented by

For the following shaded region, the linear constraints (except $x\ge 0$ and $y\ge 0$ ) are

The shaded part of given figure indicates the feasible region, then the constraints are

The shaded region in the figure is the solution set of the inequations