Mathematics for IGCSE & O level - Inequalities (Section 2 - No. 20)
Which inequalities define the shaded region in the given diagram?
y ≥ 4
y ≤ 4
y < x + 1
y > x + 1
説明
The line y=4 is a solid line with shading above it and the line y=x+1 is a dashed line with shading above it.