How to do you graph x+y=−2 by plotting points?

1 Answer
Leland Adriano Alejandro
May 14, 2016

This x+y=−2 is a linear equation. We only need two points to draw a line. Therefore, set x=0 then solve for y afterwards do the other way around. set y=0 then solve for x.Connect the points.

Explanation:

This is how to do it. From x+y=−2

Set x=0
x+y=−2
0+y=−2
y=−2

this means we have a point at (x,y)=(0,−2)

Now, let us do the other way around

From x+y=−2

set y=0

x+y=−2
x+0=−2

x=−2

this means we have another point at (x,y)=(−2,0)

We now have two distinct points (0,−2) and (−2,0). We connect these two points using a straight line to draw the graph of x+y=−2

graph{y=-1x-2[-5,5,-2.5,2.5]}

God bless ....I hope the explanation is useful.

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