Question 873141
y>=x+1

y<=-2x

The equality y=x+1
plug x= 0 you get
(0,1) 
plug y=0, you get
(-1,0)

plot(0,1),(-1,0) draw the line
shade the area above since y>=

similarly for y=-2x
x=0, y=0 (0,0)
x=5,y=-10 ( (5,-10) plot and draw the line
shade the area below the line  since y<=

then shade the intersecting relevant areas.


The equality

{{{drawing(300,300,-10,10,-10,10,grid(1),circle(0,1,0.3),circle(0,-1,0.3),circle(0,0,0.3),circle(5,-10,0.3),graph(300,300,-10,10,-10,10,y=x+1,y=-2x))}}}

The inequality

{{{drawing(300,300,-10,10,-10,10,grid(1),circle(0,1,0.3),circle(0,-1,0.3),circle(0,0,0.3),circle(5,-10,0.3),graph(300,300,-10,10,-10,10,y>=x+1,y<=-2x))}}}