How do you graph $x+y<-1$ ?

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Answer 1 · 2018-03-29T13:54:56

graph{x+y<-1 [-4,4, -2, 2]}

$x+y<-1$ can be rewrited: $y<-1-x$

Now you can draw $y=-1-x$ , using:

$x=0, y=-1-0=-1$
$x=1, y=-1-1=0$

graph{x+y=-1 [-4,4, -2, 2]}

and exclude the line and the upper region because $(0,0)$ is out of the inequation. Then

graph{x+y<-1 [-4,4, -2, 2]} graph{x+y<-1 [-4,4, -2, 2]}

How do you graph x+y<-1x+y<-1?