__PLEASE SHOW ME THE FOLLOWING GRAPHS WITH THE SHADED PORTION :__

1) x=0 [ x is greater than or equal to zero ]

2) y=0 [ y is greater than or equal to zero ]

3) x=0 , y=0 [x is greater than or equal to zero , y is greater than or equal to zero]

$Regionforx\ge 0\phantom{\rule{0ex}{0ex}}$

As we know that x =0 is nothing but y axis and if we are asked for x greater than or equal to 0 then,

it will be right to y- axis and this region can be shown as,

Here the shaded portion is the required portion.

2)

For y$\ge 0$,

as we know that y =0 is x -axis so y greater than or equal to zero will be a region above x axis and can be given as,

3)

for the region x$\ge 0\mathrm{and}\mathrm{y}\ge 0$,

Now this is nothing but intersection of first part and second part and we can see that x and y are both positive in first quadrant and so is the intersection of first part and second part,

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