Answer:
Option B.
Step-by-step explanation:
Let x be the number of open acres and y be the number of developed acres.
It is given that a community must have at least 4 acres of developed and open space.
[tex]x+y\geq 4[/tex]
The difference between the number of developed acres, y, and the number of open acres, x, can be no more than 1.
[tex]y-x\leq 1[/tex]
The relative equations of both inequalities are
[tex]x+y=4[/tex]
[tex]y-x=1[/tex]
The table of values
For line 1 Â Â Â Â Â Â Â Â Â Â Â For line 2
x    y               x    y
0 Â Â 4 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0 Â Â Â 1
4 Â Â 0 Â Â Â Â Â Â Â Â Â Â Â Â Â -1 Â Â Â 0
Plot these ordered pairs on a coordinate plane and draw both lines.
The related line of first inequality is a solid line and shaded area lies above the line because the sign of inequality is ≥.
The related line of second inequality is a solid line and shaded area lies below the line because the sign of inequality is ≤.
Therefore, the correct option is B.