Question

How do you graph `2x+y=0`?

Answer 1

See graph

Explanation:

We can see that the equation represents a straight line. Also that
Two points are sufficient to draw a straight line.

However, it is advisable to have three points so that error, if any, while calculating two points on the lines can be cross checked.

1. For `x=0`, we obtain `y=0`, so origin is a point on the line.

2. For `x=5`, we obtain `y=-10`, so next point is `(5,-10)`

3. For `x=-5`, we obtain `y=10`, another point is `(-5, 10)`

Plotting these points we get the graph

graph{2x+y=0 [-20, 20, -10, 10]}