Question:
Solve the given inequalities $x+y \leq 6, x+y \geq 4$ graphically in two-dimensional plane.
Solution:
The graphical representation of $x+y \leq 6, x+y \geq 4$ is given by common region in the figure below.
$x+y \leq 6 \ldots \ldots(1)$
$x+y \geq 4 \ldots \ldots(2)$
Inequality (1) represents the region below line $x+y=6$ (including the line $x+y=6$ ).
Inequality (2) represents the region above line $x+y=4$ (including the line $x+y=4$ ).
Therefore, every point in the common shaded region including the points on the respective lines represents the solution for the given inequalities.
This can be represented as follows,
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