The graph representing the inequalities \(|x|-y≤1,y≥0\) and \(y≤1\) is displayed below:
To determine the area of quadrilateral ABCD, the areas of triangles EAD and BFC are subtracted from the area of rectangle EFCD:
Area of ABCD = Area of EFCD − Area of △EAD − Area of △BFC
The formula used is:
\( \text{Area of ABCD} = EF \times FC - \frac{1}{2} \times EA \times ED - \frac{1}{2} \times BF \times FC \)
Substituting the given values yields:
\( = 4 \times 1 - \frac{1}{2} \times 1 \times 1 - \frac{1}{2} \times 1 \times 1 \)
\( = 4 - 0.5 - 0.5 = 3 \) square units
Final Answer: \( \boxed{3} \) square units