Question

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

Answer 1

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

Explanation:

`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]}