Question

How do you graph `abs(x + y) = 1`?

Answer 1

This is two parallel lines of slope -1 with equations:

`x+y=1` and `x+y=-1`

Explanation:

If `abs(t) = 1` then `t = +-1`

graph{abs(x+y)=1 [-10, 10, -5, 5]}