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]}