Question

How do you graph `x+y=0` by plotting points?

Answer 1

see explanation.

Explanation:

`x+y=0" is the equation " y=-x" in disguise"`

`"this tells us that every y-coordinate is the negative of the"`
`"corresponding x-coordinate"`

`rArrx=2toy=-2rArr(2,-2)`

`rArrx=1toy=-1rArr(1,-1)`

`rArrx=0toy=0rArr(0,0)`

`rArrx=-1toy=1rArr(-1,1)`

`"plot these points and draw a straight line through them"`
graph{-x [-10, 10, -5, 5]}