D : The region shaded below a dashed boundary line.
Step-by-step explanation:
The equation y = –x + 4 is the boundary line for the inequality y < –x + 4.
y=-x+4 is the boundary line for the given inequality
our given inequality is y< -x+4
there is no <=. we have only < symbol
for < symbol , the boundary line will be a dashed line
To check the shaded region we use the test point (0,0)
x=0 and y=0
plug it in the inequality
y < –x + 4
0<-0+4
0<4 Â its true
so we shade the region that contains (0,0)
Hence we shade below the dashed line
D :The region shaded below a dashed boundary line.
